malloc.h revision a04d2bc28e7d7fcaf34ad71e4a6608a13cf84197
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef LIBC_INCLUDE_MALLOC_H_ 18#define LIBC_INCLUDE_MALLOC_H_ 19 20/* 21 * Declaration of malloc routines. Bionic uses dlmalloc (see 22 * upstream-dlmalloc) but doesn't directly include it here to keep the 23 * defined malloc.h interface small. 24 */ 25#include <sys/cdefs.h> 26#include <stddef.h> 27 28__BEGIN_DECLS 29 30extern void* malloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1))); 31extern void* calloc(size_t item_count, size_t item_size) __mallocfunc __wur __attribute__((alloc_size(1,2))); 32extern void* realloc(void* p, size_t byte_count) __wur __attribute__((alloc_size(2))); 33extern void free(void* p); 34 35extern void* memalign(size_t alignment, size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(2))); 36extern size_t malloc_usable_size(const void* p); 37 38extern void* valloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1))); 39extern void* pvalloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1))); 40 41#ifndef STRUCT_MALLINFO_DECLARED 42#define STRUCT_MALLINFO_DECLARED 1 43struct mallinfo { 44 size_t arena; /* Total number of non-mmapped bytes currently allocated from OS. */ 45 size_t ordblks; /* Number of free chunks. */ 46 size_t smblks; /* (Unused.) */ 47 size_t hblks; /* (Unused.) */ 48 size_t hblkhd; /* Total number of bytes in mmapped regions. */ 49 size_t usmblks; /* Maximum total allocated space; greater than total if trimming has occurred. */ 50 size_t fsmblks; /* (Unused.) */ 51 size_t uordblks; /* Total allocated space (normal or mmapped.) */ 52 size_t fordblks; /* Total free space. */ 53 size_t keepcost; /* Upper bound on number of bytes releasable by malloc_trim. */ 54}; 55#endif /* STRUCT_MALLINFO_DECLARED */ 56 57extern struct mallinfo mallinfo(void); 58 59__END_DECLS 60 61#endif /* LIBC_INCLUDE_MALLOC_H_ */ 62