skia/ext/SkMemory_new_handler.cpp

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <new>
   8
   9 #include "base/process/memory.h"
  10
  11 #include "third_party/skia/include/core/SkTypes.h"
  12 #include "third_party/skia/include/core/SkThread.h"
  13
  14 // This implementation of sk_malloc_flags() and friends is identical to
  15 // SkMemory_malloc.cpp, except that it disables the CRT's new_handler during
  16 // malloc() and calloc() when SK_MALLOC_THROW is not set (because our normal
  17 // new_handler itself will crash on failure when using tcmalloc).
  18
  19 SK_DECLARE_STATIC_MUTEX(gSkNewHandlerMutex);
  20
  21 static inline void* throw_on_failure(size_t size, void* p) {
  22     if (size > 0 && p == NULL) {
  23         // If we've got a NULL here, the only reason we should have failed is running out of RAM.
  24         sk_out_of_memory();
  25     }
  26     return p;
  27 }
  28
  29 void sk_throw() {
  30     SkASSERT(!"sk_throw");
  31     abort();
  32 }
  33
  34 void sk_out_of_memory(void) {
  35     SkASSERT(!"sk_out_of_memory");
  36     abort();
  37 }
  38
  39 void* sk_realloc_throw(void* addr, size_t size) {
  40     return throw_on_failure(size, realloc(addr, size));
  41 }
  42
  43 void sk_free(void* p) {
  44     if (p) {
  45         free(p);
  46     }
  47 }
  48
  49 void* sk_malloc_throw(size_t size) {
  50     return throw_on_failure(size, malloc(size));
  51 }
  52
  53 static void* sk_malloc_nothrow(size_t size) {
  54     // TODO(b.kelemen): we should always use UncheckedMalloc but currently it
  55     // doesn't work as intended everywhere.
  56 #if  defined(OS_IOS)
  57     return malloc(size);
  58 #else
  59     void* result;
  60     // It's the responsibility of the caller to check the return value.
  61     ignore_result(base::UncheckedMalloc(size, &result));
  62     return result;
  63 #endif
  64 }
  65
  66 void* sk_malloc_flags(size_t size, unsigned flags) {
  67     if (flags & SK_MALLOC_THROW) {
  68         return sk_malloc_throw(size);
  69     }
  70     return sk_malloc_nothrow(size);
  71 }
  72
  73 void* sk_calloc_throw(size_t size) {
  74     return throw_on_failure(size, calloc(size, 1));
  75 }
  76
  77 void* sk_calloc(size_t size) {
  78     // TODO(b.kelemen): we should always use UncheckedCalloc but currently it
  79     // doesn't work as intended everywhere.
  80 #if  defined(OS_IOS)
  81     return calloc(1, size);
  82 #else
  83     void* result;
  84     // It's the responsibility of the caller to check the return value.
  85     ignore_result(base::UncheckedCalloc(size, 1, &result));
  86     return result;
  87 #endif
  88 }