gfx/skia/trunk/src/ports/SkPurgeableMemoryBlock_mac.cpp@129ffea94266 (annotated)
gfx/skia/trunk/src/ports/SkPurgeableMemoryBlock_mac.cpp
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright 2013 Google Inc. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 5 | * found in the LICENSE file. |
| michael@0 | 6 | */ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "SkPurgeableMemoryBlock.h" |
| michael@0 | 9 | |
| michael@0 | 10 | #include <mach/mach.h> |
| michael@0 | 11 | |
| michael@0 | 12 | bool SkPurgeableMemoryBlock::IsSupported() { |
| michael@0 | 13 | return true; |
| michael@0 | 14 | } |
| michael@0 | 15 | |
| michael@0 | 16 | #ifdef SK_DEBUG |
| michael@0 | 17 | bool SkPurgeableMemoryBlock::PlatformSupportsPurgingAllUnpinnedBlocks() { |
| michael@0 | 18 | return true; |
| michael@0 | 19 | } |
| michael@0 | 20 | |
| michael@0 | 21 | bool SkPurgeableMemoryBlock::PurgeAllUnpinnedBlocks() { |
| michael@0 | 22 | // Unused. |
| michael@0 | 23 | int state = 0; |
| michael@0 | 24 | kern_return_t ret = vm_purgable_control(mach_task_self(), 0, VM_PURGABLE_PURGE_ALL, &state); |
| michael@0 | 25 | return ret == KERN_SUCCESS; |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | bool SkPurgeableMemoryBlock::purge() { |
| michael@0 | 29 | return false; |
| michael@0 | 30 | } |
| michael@0 | 31 | #endif |
| michael@0 | 32 | |
| michael@0 | 33 | static size_t round_to_page_size(size_t size) { |
| michael@0 | 34 | const size_t mask = 4096 - 1; |
| michael@0 | 35 | return (size + mask) & ~mask; |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | SkPurgeableMemoryBlock::SkPurgeableMemoryBlock(size_t size) |
| michael@0 | 39 | : fAddr(NULL) |
| michael@0 | 40 | , fSize(round_to_page_size(size)) |
| michael@0 | 41 | , fPinned(false) { |
| michael@0 | 42 | } |
| michael@0 | 43 | |
| michael@0 | 44 | SkPurgeableMemoryBlock::~SkPurgeableMemoryBlock() { |
| michael@0 | 45 | SkDEBUGCODE(kern_return_t ret =) vm_deallocate(mach_task_self(), |
| michael@0 | 46 | reinterpret_cast<vm_address_t>(fAddr), |
| michael@0 | 47 | static_cast<vm_size_t>(fSize)); |
| michael@0 | 48 | #ifdef SK_DEBUG |
| michael@0 | 49 | if (ret != KERN_SUCCESS) { |
| michael@0 | 50 | SkDebugf("SkPurgeableMemoryBlock destructor failed to deallocate.\n"); |
| michael@0 | 51 | } |
| michael@0 | 52 | #endif |
| michael@0 | 53 | } |
| michael@0 | 54 | |
| michael@0 | 55 | void* SkPurgeableMemoryBlock::pin(SkPurgeableMemoryBlock::PinResult* pinResult) { |
| michael@0 | 56 | SkASSERT(!fPinned); |
| michael@0 | 57 | SkASSERT(pinResult != NULL); |
| michael@0 | 58 | if (NULL == fAddr) { |
| michael@0 | 59 | vm_address_t addr = 0; |
| michael@0 | 60 | kern_return_t ret = vm_allocate(mach_task_self(), &addr, static_cast<vm_size_t>(fSize), |
| michael@0 | 61 | VM_FLAGS_PURGABLE | VM_FLAGS_ANYWHERE); |
| michael@0 | 62 | if (KERN_SUCCESS == ret) { |
| michael@0 | 63 | fAddr = reinterpret_cast<void*>(addr); |
| michael@0 | 64 | *pinResult = kUninitialized_PinResult; |
| michael@0 | 65 | fPinned = true; |
| michael@0 | 66 | } else { |
| michael@0 | 67 | fAddr = NULL; |
| michael@0 | 68 | } |
| michael@0 | 69 | } else { |
| michael@0 | 70 | int state = VM_PURGABLE_NONVOLATILE; |
| michael@0 | 71 | kern_return_t ret = vm_purgable_control(mach_task_self(), |
| michael@0 | 72 | reinterpret_cast<vm_address_t>(fAddr), |
| michael@0 | 73 | VM_PURGABLE_SET_STATE, &state); |
| michael@0 | 74 | if (ret != KERN_SUCCESS) { |
| michael@0 | 75 | fAddr = NULL; |
| michael@0 | 76 | fPinned = false; |
| michael@0 | 77 | return NULL; |
| michael@0 | 78 | } |
| michael@0 | 79 | |
| michael@0 | 80 | fPinned = true; |
| michael@0 | 81 | |
| michael@0 | 82 | if (state & VM_PURGABLE_EMPTY) { |
| michael@0 | 83 | *pinResult = kUninitialized_PinResult; |
| michael@0 | 84 | } else { |
| michael@0 | 85 | *pinResult = kRetained_PinResult; |
| michael@0 | 86 | } |
| michael@0 | 87 | } |
| michael@0 | 88 | return fAddr; |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | void SkPurgeableMemoryBlock::unpin() { |
| michael@0 | 92 | SkASSERT(fPinned); |
| michael@0 | 93 | int state = VM_PURGABLE_VOLATILE | VM_VOLATILE_GROUP_DEFAULT; |
| michael@0 | 94 | SkDEBUGCODE(kern_return_t ret =) vm_purgable_control(mach_task_self(), |
| michael@0 | 95 | reinterpret_cast<vm_address_t>(fAddr), |
| michael@0 | 96 | VM_PURGABLE_SET_STATE, &state); |
| michael@0 | 97 | fPinned = false; |
| michael@0 | 98 | |
| michael@0 | 99 | #ifdef SK_DEBUG |
| michael@0 | 100 | if (ret != KERN_SUCCESS) { |
| michael@0 | 101 | SkDebugf("SkPurgeableMemoryBlock::unpin() failed.\n"); |
| michael@0 | 102 | } |
| michael@0 | 103 | #endif |
| michael@0 | 104 | } |
