SkTypes.h revision 0e51577a14f903ffeafa117a75954baeb173ffb9
1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 28a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/* 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2006 The Android Open Source Project 48a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com * 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Use of this source code is governed by a BSD-style license that can be 6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * found in the LICENSE file. 78a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 88a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef SkTypes_DEFINED 118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkTypes_DEFINED 128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPreConfig.h" 148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkUserConfig.h" 158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPostConfig.h" 168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef SK_IGNORE_STDINT_DOT_H 188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #include <stdint.h> 198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include <stdio.h> 228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** \file SkTypes.h 248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 269aa8b32233702b19b97bebdc2c702e0c53407d45reed@android.com/** See SkGraphics::GetVersion() to retrieve these at runtime 279aa8b32233702b19b97bebdc2c702e0c53407d45reed@android.com */ 289aa8b32233702b19b97bebdc2c702e0c53407d45reed@android.com#define SKIA_VERSION_MAJOR 1 299aa8b32233702b19b97bebdc2c702e0c53407d45reed@android.com#define SKIA_VERSION_MINOR 0 309aa8b32233702b19b97bebdc2c702e0c53407d45reed@android.com#define SKIA_VERSION_PATCH 0 319aa8b32233702b19b97bebdc2c702e0c53407d45reed@android.com 328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/* 338a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com memory wrappers to be implemented by the porting layer (platform) 348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Called internally if we run out of memory. The platform implementation must 378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com not return, but should either throw an exception or otherwise exit. 388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 39de916c8ac866378cee9af2bf161c79f528d9ccd5reed@google.comSK_API extern void sk_out_of_memory(void); 408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Called internally if we hit an unrecoverable error. 418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com The platform implementation must not return, but should either throw 428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com an exception or otherwise exit. 438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 44de916c8ac866378cee9af2bf161c79f528d9ccd5reed@google.comSK_API extern void sk_throw(void); 458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comenum { 478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SK_MALLOC_TEMP = 0x01, //!< hint to sk_malloc that the requested memory will be freed in the scope of the stack frame 488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SK_MALLOC_THROW = 0x02 //!< instructs sk_malloc to call sk_throw if the memory cannot be allocated. 498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Return a block of memory (at least 4-byte aligned) of at least the 518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com specified size. If the requested memory cannot be returned, either 528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return null (if SK_MALLOC_TEMP bit is clear) or call sk_throw() 538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com (if SK_MALLOC_TEMP bit is set). To free the memory, call sk_free(). 548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 557ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.orgSK_API extern void* sk_malloc_flags(size_t size, unsigned flags); 568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Same as sk_malloc(), but hard coded to pass SK_MALLOC_THROW as the flag 578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 58de916c8ac866378cee9af2bf161c79f528d9ccd5reed@google.comSK_API extern void* sk_malloc_throw(size_t size); 598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Same as standard realloc(), but this one never returns null on failure. It will throw 608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com an exception if it fails. 618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 62de916c8ac866378cee9af2bf161c79f528d9ccd5reed@google.comSK_API extern void* sk_realloc_throw(void* buffer, size_t size); 638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Free memory returned by sk_malloc(). It is safe to pass null. 648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 65de916c8ac866378cee9af2bf161c79f528d9ccd5reed@google.comSK_API extern void sk_free(void*); 668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 674516f4786f5dda1b86a8f825b9e8e910d9c2363creed@android.com// bzero is safer than memset, but we can't rely on it, so... sk_bzero() 684516f4786f5dda1b86a8f825b9e8e910d9c2363creed@android.comstatic inline void sk_bzero(void* buffer, size_t size) { 694516f4786f5dda1b86a8f825b9e8e910d9c2363creed@android.com memset(buffer, 0, size); 704516f4786f5dda1b86a8f825b9e8e910d9c2363creed@android.com} 714516f4786f5dda1b86a8f825b9e8e910d9c2363creed@android.com 72bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com/////////////////////////////////////////////////////////////////////////////// 73bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com 74bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com#ifdef SK_OVERRIDE_GLOBAL_NEW 75bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com#include <new> 76bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com 77bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.cominline void* operator new(size_t size) { 78bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com return sk_malloc_throw(size); 79bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com} 80bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com 81bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.cominline void operator delete(void* p) { 82bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com sk_free(p); 83bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com} 84bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com#endif 85bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com 86bdf736133b513bb13f7c66e01c8c37ac526ce8d4reed@google.com/////////////////////////////////////////////////////////////////////////////// 878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_INIT_TO_AVOID_WARNING = 0 898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef SkDebugf 918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void SkDebugf(const char format[], ...); 928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_DEBUG 958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkASSERT(cond) SK_DEBUGBREAK(cond) 960c00f21fee3f5cfa3aa7e5d46ff94cb8cf340451tomhudson@google.com #define SkDEBUGFAIL(message) SkASSERT(false && message) 978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkDEBUGCODE(code) code 988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkDECLAREPARAM(type, var) , type var 998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkPARAM(var) , var 1008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com// #define SkDEBUGF(args ) SkDebugf##args 1018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkDEBUGF(args ) SkDebugf args 1028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkAssertResult(cond) SkASSERT(cond) 1038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 1048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkASSERT(cond) 1050c00f21fee3f5cfa3aa7e5d46ff94cb8cf340451tomhudson@google.com #define SkDEBUGFAIL(message) 1068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkDEBUGCODE(code) 1078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkDEBUGF(args) 1088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkDECLAREPARAM(type, var) 1098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkPARAM(var) 1108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // unlike SkASSERT, this guy executes its condition in the non-debug build 1128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkAssertResult(cond) cond 1138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 1148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 11528be72b63e457c680c192a34fb9f58e1c693363fvandebo@chromium.orgtemplate <bool> 11628be72b63e457c680c192a34fb9f58e1c693363fvandebo@chromium.orgstruct SkCompileAssert { 11728be72b63e457c680c192a34fb9f58e1c693363fvandebo@chromium.org}; 11828be72b63e457c680c192a34fb9f58e1c693363fvandebo@chromium.org 11928be72b63e457c680c192a34fb9f58e1c693363fvandebo@chromium.org#define SK_COMPILE_ASSERT(expr, msg) \ 12028be72b63e457c680c192a34fb9f58e1c693363fvandebo@chromium.org typedef SkCompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1] 12128be72b63e457c680c192a34fb9f58e1c693363fvandebo@chromium.org 12249a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com/* 12349a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com * Usage: SK_MACRO_CONCAT(a, b) to construct the symbol ab 12449a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com * 12549a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com * SK_MACRO_CONCAT_IMPL_PRIV just exists to make this work. Do not use directly 12649a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com * 12749a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com */ 12849a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com#define SK_MACRO_CONCAT(X, Y) SK_MACRO_CONCAT_IMPL_PRIV(X, Y) 12949a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com#define SK_MACRO_CONCAT_IMPL_PRIV(X, Y) X ## Y 13049a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com 13149a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com/* 13249a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com * Usage: SK_MACRO_APPEND_LINE(foo) to make foo123, where 123 is the current 13349a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com * line number. Easy way to construct 13449a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com * unique names for local functions or 13549a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com * variables. 13649a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com */ 13749a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com#define SK_MACRO_APPEND_LINE(name) SK_MACRO_CONCAT(name, __LINE__) 13849a5b1967ac5bbc6699bee9a2c66088c42aef6fdreed@google.com 1398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/////////////////////////////////////////////////////////////////////// 1408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 14137a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com/** 14237a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * Fast type for signed 8 bits. Use for parameter passing and local variables, 14337a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * not for storage. 14437a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com */ 14537a3133d2009b276f2126ccb61be1f69074cacb9reed@google.comtypedef int S8CPU; 1468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 14737a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com/** 14837a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * Fast type for unsigned 8 bits. Use for parameter passing and local 14937a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * variables, not for storage 15037a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com */ 15137a3133d2009b276f2126ccb61be1f69074cacb9reed@google.comtypedef unsigned U8CPU; 15237a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com 15337a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com/** 15437a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * Fast type for signed 16 bits. Use for parameter passing and local variables, 15537a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * not for storage 15637a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com */ 15737a3133d2009b276f2126ccb61be1f69074cacb9reed@google.comtypedef int S16CPU; 15837a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com 15937a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com/** 16037a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * Fast type for unsigned 16 bits. Use for parameter passing and local 16137a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * variables, not for storage 16237a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com */ 16337a3133d2009b276f2126ccb61be1f69074cacb9reed@google.comtypedef unsigned U16CPU; 16437a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com 16537a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com/** 16637a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * Meant to be faster than bool (doesn't promise to be 0 or 1, 16737a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * just 0 or non-zero 16837a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com */ 16937a3133d2009b276f2126ccb61be1f69074cacb9reed@google.comtypedef int SkBool; 17037a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com 17137a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com/** 17237a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com * Meant to be a small version of bool, for storage purposes. Will be 0 or 1 17337a3133d2009b276f2126ccb61be1f69074cacb9reed@google.com */ 17437a3133d2009b276f2126ccb61be1f69074cacb9reed@google.comtypedef uint8_t SkBool8; 1758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_DEBUG 1777ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.org SK_API int8_t SkToS8(long); 1787ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.org SK_API uint8_t SkToU8(size_t); 1797ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.org SK_API int16_t SkToS16(long); 1807ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.org SK_API uint16_t SkToU16(size_t); 1817ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.org SK_API int32_t SkToS32(long); 1827ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.org SK_API uint32_t SkToU32(size_t); 1838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 1848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkToS8(x) ((int8_t)(x)) 1858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkToU8(x) ((uint8_t)(x)) 1868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkToS16(x) ((int16_t)(x)) 1878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkToU16(x) ((uint16_t)(x)) 1888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkToS32(x) ((int32_t)(x)) 1898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com #define SkToU32(x) ((uint32_t)(x)) 1908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 1918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Returns 0 or 1 based on the condition 1938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 1948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkToBool(cond) ((cond) != 0) 1958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MaxS16 32767 1978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MinS16 -32767 1988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MaxU16 0xFFFF 1998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MinU16 0 2008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MaxS32 0x7FFFFFFF 201594dd3cd78e2f970d53bb0934fbbb63b41e1d40ccaryclark@google.com#define SK_MinS32 -SK_MaxS32 2028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MaxU32 0xFFFFFFFF 2038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MinU32 0 2040e51577a14f903ffeafa117a75954baeb173ffb9humper@google.com#define SK_NaN32 (1 << 31) 2058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 206d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com/** Returns true if the value can be represented with signed 16bits 207d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com */ 20890209caa686464cad70dd9d60b53c3d967eb57dareed@android.comstatic inline bool SkIsS16(long x) { 209d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com return (int16_t)x == x; 210d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com} 211d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com 212d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com/** Returns true if the value can be represented with unsigned 16bits 213d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com */ 21490209caa686464cad70dd9d60b53c3d967eb57dareed@android.comstatic inline bool SkIsU16(long x) { 215d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com return (uint16_t)x == x; 216d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com} 217d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com 218d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com////////////////////////////////////////////////////////////////////////////// 2198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef SK_OFFSETOF 22056d3a23c3e0a53777fb25898951718d44dd9c027reed@google.com #define SK_OFFSETOF(type, field) (size_t)((char*)&(((type*)1)->field) - (char*)1) 2218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 2228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Returns the number of entries in an array (not a pointer) 2248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 2258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_ARRAY_COUNT(array) (sizeof(array) / sizeof(array[0])) 2268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkAlign2(x) (((x) + 1) >> 1 << 1) 228c6faa5a0c46004115739cf34e29f4a3aa56a2adcreed@google.com#define SkIsAlign2(x) (0 == ((x) & 1)) 229c6faa5a0c46004115739cf34e29f4a3aa56a2adcreed@google.com 2308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkAlign4(x) (((x) + 3) >> 2 << 2) 231c6faa5a0c46004115739cf34e29f4a3aa56a2adcreed@google.com#define SkIsAlign4(x) (0 == ((x) & 3)) 2328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 233c6faa5a0c46004115739cf34e29f4a3aa56a2adcreed@google.com#define SkAlign8(x) (((x) + 7) >> 3 << 3) 234c6faa5a0c46004115739cf34e29f4a3aa56a2adcreed@google.com#define SkIsAlign8(x) (0 == ((x) & 7)) 23501224d5d0a3228fe47e63d8346e0e433a87563a8tomhudson@google.com 2368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtypedef uint32_t SkFourByteTag; 2378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkSetFourByteTag(a, b, c, d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d)) 2388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2398a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** 32 bit integer to hold a unicode value 2408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 2418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtypedef int32_t SkUnichar; 2428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** 32 bit value to hold a millisecond count 2438a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 2448a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtypedef uint32_t SkMSec; 2458a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** 1 second measured in milliseconds 2468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 2478a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MSec1 1000 2488a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** maximum representable milliseconds 2498a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 2508a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SK_MSecMax 0x7FFFFFFF 2518a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Returns a < b for milliseconds, correctly handling wrap-around from 0xFFFFFFFF to 0 2528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 2538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkMSec_LT(a, b) ((int32_t)(a) - (int32_t)(b) < 0) 2548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Returns a <= b for milliseconds, correctly handling wrap-around from 0xFFFFFFFF to 0 2558a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 2568a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkMSec_LE(a, b) ((int32_t)(a) - (int32_t)(b) <= 0) 2578a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2588a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/**************************************************************************** 2598a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com The rest of these only build with C++ 2608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 2618a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef __cplusplus 2628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 2638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Faster than SkToBool for integral conditions. Returns 0 or 1 2648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 265d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline int Sk32ToBool(uint32_t n) { 2668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return (n | (0-n)) >> 31; 2678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 2688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 269d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comtemplate <typename T> inline void SkTSwap(T& a, T& b) { 2708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com T c(a); 2718a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com a = b; 2728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com b = c; 2738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 2748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 275d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline int32_t SkAbs32(int32_t value) { 2768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_CPU_HAS_CONDITIONAL_INSTR 2778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (value < 0) 2788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com value = -value; 2798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return value; 2808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 2818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int32_t mask = value >> 31; 2828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return (value ^ mask) - mask; 2838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 2848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 2858a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 286d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline int32_t SkMax32(int32_t a, int32_t b) { 2878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (a < b) 2888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com a = b; 2898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return a; 2908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 2918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 292d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline int32_t SkMin32(int32_t a, int32_t b) { 2938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (a > b) 2948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com a = b; 2958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return a; 2968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 2978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 298d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline int32_t SkSign32(int32_t a) { 2998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return (a >> 31) | ((unsigned) -a >> 31); 3008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 3018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 302d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline int32_t SkFastMin32(int32_t value, int32_t max) { 3038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_CPU_HAS_CONDITIONAL_INSTR 3048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (value > max) 3058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com value = max; 3068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return value; 3078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 3088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com int diff = max - value; 3098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // clear diff if it is negative (clear if value > max) 3108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com diff &= (diff >> 31); 3118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return value + diff; 3128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 3138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 3148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** Returns signed 32 bit value pinned between min and max, inclusively 3168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 317d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline int32_t SkPin32(int32_t value, int32_t min, int32_t max) { 3188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifdef SK_CPU_HAS_CONDITIONAL_INSTR 3198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (value < min) 3208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com value = min; 3218a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (value > max) 3228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com value = max; 3238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#else 3248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com if (value < min) 3258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com value = min; 3268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com else if (value > max) 3278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com value = max; 3288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 3298a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return value; 3308a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 3318a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 332d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline uint32_t SkSetClearShift(uint32_t bits, bool cond, 333d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com unsigned shift) { 3348a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkASSERT((int)cond == 0 || (int)cond == 1); 3358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return (bits & ~(1 << shift)) | ((int)cond << shift); 3368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 3378a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 338d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.comstatic inline uint32_t SkSetClearMask(uint32_t bits, bool cond, 339d4577757874d1dda1a3bffa3f2347c251859c27ereed@android.com uint32_t mask) { 3408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return cond ? bits | mask : bits & ~mask; 3418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com} 3428a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3431fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com/////////////////////////////////////////////////////////////////////////////// 3441fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com 345325cb9aa17b94258b362082eb3a799524f4345f3vandebo@chromium.org/** Use to combine multiple bits in a bitmask in a type safe way. 346325cb9aa17b94258b362082eb3a799524f4345f3vandebo@chromium.org */ 347325cb9aa17b94258b362082eb3a799524f4345f3vandebo@chromium.orgtemplate <typename T> 348325cb9aa17b94258b362082eb3a799524f4345f3vandebo@chromium.orgT SkTBitOr(T a, T b) { 349325cb9aa17b94258b362082eb3a799524f4345f3vandebo@chromium.org return (T)(a | b); 350325cb9aa17b94258b362082eb3a799524f4345f3vandebo@chromium.org} 351325cb9aa17b94258b362082eb3a799524f4345f3vandebo@chromium.org 3521fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com/** 3531fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com * Use to cast a pointer to a different type, and maintaining strict-aliasing 3541fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com */ 3551fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.comtemplate <typename Dst> Dst SkTCast(const void* ptr) { 3561fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com union { 3571fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com const void* src; 3581fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com Dst dst; 3591fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com } data; 3601fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com data.src = ptr; 3611fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com return data.dst; 3621fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com} 3631fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com 3648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com////////////////////////////////////////////////////////////////////////////// 3658a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3668a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/** \class SkNoncopyable 3678a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3688a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comSkNoncopyable is the base class for objects that may do not want to 3698a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.combe copied. It hides its copy-constructor and its assignment-operator. 3708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com*/ 3717ffb1b21abcc7bbed5a0fc711f6dd7b9dbb4f577ctguil@chromium.orgclass SK_API SkNoncopyable { 3728a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 3738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkNoncopyable() {} 3741fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com 3758a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate: 3768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkNoncopyable(const SkNoncopyable&); 3778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkNoncopyable& operator=(const SkNoncopyable&); 3788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 3798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkAutoFree : SkNoncopyable { 3818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 3828a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkAutoFree() : fPtr(NULL) {} 3838a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com explicit SkAutoFree(void* ptr) : fPtr(ptr) {} 3848a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com ~SkAutoFree() { sk_free(fPtr); } 3851fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com 3868a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Return the currently allocate buffer, or null 3878a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3888a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void* get() const { return fPtr; } 3898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 3908a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Assign a new ptr allocated with sk_malloc (or null), and return the 3918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com previous ptr. Note it is the caller's responsibility to sk_free the 3928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com returned ptr. 3938a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 3948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void* set(void* ptr) { 3958a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void* prev = fPtr; 3968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com fPtr = ptr; 3978a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return prev; 3988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 3991fcd51e6b2a210a37b9b9c2cfb82e1be7196e42areed@google.com 4008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Transfer ownership of the current ptr to the caller, setting the 4018a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com internal reference to null. Note the caller is reponsible for calling 4028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com sk_free on the returned address. 4038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 4048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void* detach() { return this->set(NULL); } 4058a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com /** Free the current buffer, and set the internal reference to NULL. Same 4078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com as calling sk_free(detach()) 4088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 4098a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void free() { 4108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com sk_free(fPtr); 4118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com fPtr = NULL; 4128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 4138a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate: 4158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void* fPtr; 4168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // illegal 4178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkAutoFree(const SkAutoFree&); 4188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkAutoFree& operator=(const SkAutoFree&); 4198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 4208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4217d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com/** 4227d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com * Manage an allocated block of heap memory. This object is the sole manager of 4237d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com * the lifetime of the block, so the caller must not call sk_free() or delete 4241c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * on the block, unless detach() was called. 4257d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com */ 4267d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.comclass SkAutoMalloc : public SkNoncopyable { 4278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 4283ab4195445d8541b2950bd30ccaefe1e345afa25reed@google.com explicit SkAutoMalloc(size_t size = 0) { 4293ab4195445d8541b2950bd30ccaefe1e345afa25reed@google.com fPtr = size ? sk_malloc_throw(size) : NULL; 4307d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com fSize = size; 4317d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com } 4328a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4337d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com ~SkAutoMalloc() { 4347d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com sk_free(fPtr); 4357d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com } 4368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 4377d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com /** 4381c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * Passed to reset to specify what happens if the requested size is smaller 4391c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * than the current size (and the current block was dynamically allocated). 4401c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com */ 4411c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com enum OnShrink { 4421c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com /** 4431c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * If the requested size is smaller than the current size, and the 4441c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * current block is dynamically allocated, free the old block and 4451c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * malloc a new block of the smaller size. 4461c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com */ 4471c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com kAlloc_OnShrink, 448fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 4491c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com /** 4501c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * If the requested size is smaller than the current size, and the 4511c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * current block is dynamically allocated, just return the old 4521c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com * block. 4531c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com */ 4541f90287df3129cb267422e482c52ebeca6a8990ftomhudson@google.com kReuse_OnShrink 4551c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com }; 4561c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com 4571c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com /** 4587d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com * Reallocates the block to a new size. The ptr may or may not change. 4597d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com */ 4601c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com void* reset(size_t size, OnShrink shrink = kAlloc_OnShrink) { 4611c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com if (size == fSize || (kReuse_OnShrink == shrink && size < fSize)) { 4621c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com return fPtr; 4637d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com } 4641c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com 4651c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com sk_free(fPtr); 4661c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com fPtr = size ? sk_malloc_throw(size) : NULL; 4671c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com fSize = size; 4681c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com 4697d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com return fPtr; 4708a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 4717d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com 4727d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com /** 4737d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com * Releases the block back to the heap 4747d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com */ 4757d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com void free() { 4767d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com this->reset(0); 4777d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com } 4787d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com 4797d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com /** 4807d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com * Return the allocated block. 4817d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com */ 4827d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com void* get() { return fPtr; } 4837d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com const void* get() const { return fPtr; } 4847d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com 4856dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com /** Transfer ownership of the current ptr to the caller, setting the 4866dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com internal reference to null. Note the caller is reponsible for calling 4876dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com sk_free on the returned address. 4886dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com */ 4896dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com void* detach() { 4906dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com void* ptr = fPtr; 4916dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com fPtr = NULL; 4926dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com fSize = 0; 4936dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com return ptr; 4946dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com } 4956dcd27cd5e2e1f7a1f4d85bd546586a4d2bd4f41bsalomon@google.com 4967d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.comprivate: 4977d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com void* fPtr; 4981c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com size_t fSize; // can be larger than the requested size (see kReuse) 4998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 5008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 50163a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com/** 50263a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * Manage an allocated block of memory. If the requested size is <= kSize, then 50363a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * the allocation will come from the stack rather than the heap. This object 50463a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * is the sole manager of the lifetime of the block, so the caller must not 50563a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * call sk_free() or delete on the block. 50663a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com */ 5078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comtemplate <size_t kSize> class SkAutoSMalloc : SkNoncopyable { 5088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 50963a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com /** 51063a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * Creates initially empty storage. get() returns a ptr, but it is to 5117d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com * a zero-byte allocation. Must call reset(size) to return an allocated 51263a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * block. 51363a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com */ 51463a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com SkAutoSMalloc() { 51563a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com fPtr = fStorage; 5161c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com fSize = 0; 5178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 51863a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com 51963a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com /** 52063a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * Allocate a block of the specified size. If size <= kSize, then the 52163a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * allocation will come from the stack, otherwise it will be dynamically 52263a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * allocated. 52363a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com */ 52463a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com explicit SkAutoSMalloc(size_t size) { 52563a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com fPtr = fStorage; 5267a17e3a34fd8854d8ce9b06f37b69b73b5d4992dreed@google.com fSize = 0; 5277d4679a2e1aaa1953bc20d668135c517ee488c11bsalomon@google.com this->reset(size); 52863a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com } 52963a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com 53063a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com /** 53163a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * Free the allocated block (if any). If the block was small enought to 53263a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * have been allocated on the stack (size <= kSize) then this does nothing. 53363a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com */ 53463a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com ~SkAutoSMalloc() { 53563a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com if (fPtr != (void*)fStorage) { 5368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com sk_free(fPtr); 53763a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com } 5388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 53963a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com 54063a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com /** 54163a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * Return the allocated block. May return non-null even if the block is 54263a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * of zero size. Since this may be on the stack or dynamically allocated, 54363a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * the caller must not call sk_free() on it, but must rely on SkAutoSMalloc 54463a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * to manage it. 54563a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com */ 5468a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void* get() const { return fPtr; } 54763a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com 54863a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com /** 54963a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * Return a new block of the requested size, freeing (as necessary) any 55063a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * previously allocated block. As with the constructor, if size <= kSize 55163a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * then the return block may be allocated locally, rather than from the 55263a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com * heap. 55363a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com */ 5541c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com void* reset(size_t size, 5551c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com SkAutoMalloc::OnShrink shrink = SkAutoMalloc::kAlloc_OnShrink) { 5561c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com if (size == fSize || (SkAutoMalloc::kReuse_OnShrink == shrink && 5571c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com size < fSize)) { 5581c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com return fPtr; 5591c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com } 5601c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com 56163a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com if (fPtr != (void*)fStorage) { 56263a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com sk_free(fPtr); 56363a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com } 56463a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com 56563a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com if (size <= kSize) { 56663a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com fPtr = fStorage; 56763a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com } else { 56863a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com fPtr = sk_malloc_flags(size, SK_MALLOC_THROW | SK_MALLOC_TEMP); 56963a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com } 57063a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com return fPtr; 57163a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com } 57263a6060fcdc16245ea3958e7fd88ae32c5e631a3reed@google.com 5738a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comprivate: 5748a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void* fPtr; 5751c401d8f42dbb3d2fd8f249a2acbe4bac829ff00reed@google.com size_t fSize; // can be larger than the requested size (see kReuse) 5768a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com uint32_t fStorage[(kSize + 3) >> 2]; 5778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 5788a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5798a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif /* C++ */ 5808a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 5818a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 582