15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2008, Google Inc. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// All rights reserved. 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Redistribution and use in source and binary forms, with or without 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// modification, are permitted provided that the following conditions are 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// met: 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Redistributions of source code must retain the above copyright 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// notice, this list of conditions and the following disclaimer. 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Redistributions in binary form must reproduce the above 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// copyright notice, this list of conditions and the following disclaimer 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// in the documentation and/or other materials provided with the 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// distribution. 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// * Neither the name of Google Inc. nor the names of its 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// contributors may be used to endorse or promote products derived from 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// this software without specific prior written permission. 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// --- 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Author: Sanjay Ghemawat <opensource@google.com> 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <config.h> 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "span.h" 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <string.h> // for NULL, memset 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "internal_logging.h" // for ASSERT 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "page_heap_allocator.h" // for PageHeapAllocator 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "static_vars.h" // for Static 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace tcmalloc { 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef SPAN_HISTORY 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void Event(Span* span, char op, int v = 0) { 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->history[span->nexthistory] = op; 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->value[span->nexthistory] = v; 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->nexthistory++; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (span->nexthistory == sizeof(span->history)) span->nexthistory = 0; 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)Span* NewSpan(PageID p, Length len) { 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Span* result = Static::span_allocator()->New(); 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(result, 0, sizeof(*result)); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result->start = p; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result->length = len; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifdef SPAN_HISTORY 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result->nexthistory = 0; 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return result; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DeleteSpan(Span* span) { 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef NDEBUG 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In debug mode, trash the contents of deleted Spans 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(span, 0x3f, sizeof(*span)); 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Static::span_allocator()->Delete(span); 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DLL_Init(Span* list) { 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) list->next = list; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) list->prev = list; 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DLL_Remove(Span* span) { 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->prev->next = span->next; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->next->prev = span->prev; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->prev = NULL; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->next = NULL; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int DLL_Length(const Span* list) { 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int result = 0; 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (Span* s = list->next; s != list; s = s->next) { 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result++; 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return result; 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void DLL_Prepend(Span* list, Span* span) { 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ASSERT(span->next == NULL); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ASSERT(span->prev == NULL); 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->next = list->next; 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) span->prev = list; 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) list->next->prev = span; 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) list->next = span; 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace tcmalloc 102