Add sk_calloc. Remove SkMemory_stdlib, which seems unused.

src/core/SkMemory_stdlib.cpp

-
-/*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkTypes.h"
-#include <stdio.h>
-#include <stdlib.h>
-
-#ifdef SK_DEBUG
-    #define SK_TAG_BLOCKS
-    // #define SK_TRACK_ALLOC  // enable to see a printf for every alloc/free
-    // #define SK_CHECK_TAGS   // enable to double-check debugging link list
-#endif
-
-#ifdef SK_TAG_BLOCKS
-
-#include "SkThread.h"
-
-// size this (as a multiple of 4) so that the total offset to the internal data
-// is at least a multiple of 8 (since some clients of our malloc may require
-// that.
-static const char kBlockHeaderTag[] = { 's', 'k', 'i', 'a', '1', '2', '3', '4' };
-static const char kBlockTrailerTag[] = { 'a', 'i', 'k', 's' };
-#define kByteFill 0xCD
-#define kDeleteFill 0xEF
-
-static SkBaseMutex& get_block_mutex() {
-    static SkMutex* gBlockMutex;
-    if (NULL == gBlockMutex) {
-        gBlockMutex = new SkMutex;
-    }
-    return *gBlockMutex;
-}
-
-static struct SkBlockHeader* gHeader;
-
-struct SkBlockHeader {
-    SkBlockHeader* fNext;
-#ifdef SK_CHECK_TAGS
-    SkBlockHeader** fTop; // set to verify in debugger that block was alloc'd / freed with same gHeader
-    SkBlockHeader* fPrevious; // set to see in debugger previous block when corruption happens
-#endif
-    size_t fSize;
-    char fHeader[sizeof(kBlockHeaderTag)];
-    // data goes here. The offset to this point must be a multiple of 8
-    char fTrailer[sizeof(kBlockTrailerTag)];
-
-    void* add(size_t realSize)
-    {
-        SkAutoMutexAcquire  ac(get_block_mutex());
-        InMutexValidate();
-        fNext = gHeader;
-#ifdef SK_CHECK_TAGS
-        fTop = &gHeader;
-        fPrevious = NULL;
-        if (fNext != NULL)
-            fNext->fPrevious = this;
-#endif
-        gHeader = this;
-        fSize = realSize;
-        memcpy(fHeader, kBlockHeaderTag, sizeof(kBlockHeaderTag));
-        void* result = fTrailer;
-        void* trailer = (char*)result + realSize;
-        memcpy(trailer, kBlockTrailerTag, sizeof(kBlockTrailerTag));
-        return result;
-    }
-
-    static void Dump()
-    {
-        SkAutoMutexAcquire  ac(get_block_mutex());
-        InMutexValidate();
-        SkBlockHeader* header = gHeader;
-        int count = 0;
-        size_t size = 0;
-        while (header != NULL) {
-            char scratch[256];
-            char* pos = scratch;
-            size_t size = header->fSize;
-            int* data = (int*)(void*)header->fTrailer;
-            pos += sprintf(pos, "%p 0x%08zx (%7zd)  ",
-                data, size, size);
-            size >>= 2;
-            size_t ints = size > 4 ? 4 : size;
-            size_t index;
-            for (index = 0; index < ints; index++)
-                pos += sprintf(pos, "0x%08x ", data[index]);
-            pos += sprintf(pos, " (");
-            for (index = 0; index < ints; index++)
-                pos += sprintf(pos, "%g ", data[index] / 65536.0f);
-            if (ints > 0)
-                --pos;
-            pos += sprintf(pos, ") \"");
-            size_t chars = size > 16 ? 16 : size;
-            char* chPtr = (char*) data;
-            for (index = 0; index < chars; index++) {
-                char ch = chPtr[index];
-                pos += sprintf(pos, "%c", ch >= ' ' && ch < 0x7f ? ch : '?');
-            }
-            pos += sprintf(pos, "\"");
-            SkDebugf("%s\n", scratch);
-            count++;
-            size += header->fSize;
-            header = header->fNext;
-        }
-        SkDebugf("--- count %d  size 0x%08x (%zd) ---\n", count, size, size);
-    }
-
-    void remove() const
-    {
-        SkAutoMutexAcquire  ac(get_block_mutex());
-        SkBlockHeader** findPtr = &gHeader;
-        do {
-            SkBlockHeader* find = *findPtr;
-            SkASSERT(find != NULL);
-            if (find == this) {
-                *findPtr = fNext;
-                break;
-            }
-            findPtr = &find->fNext;
-        } while (true);
-        InMutexValidate();
-        SkASSERT(memcmp(fHeader, kBlockHeaderTag, sizeof(kBlockHeaderTag)) == 0);
-        const char* trailer = fTrailer + fSize;
-        SkASSERT(memcmp(trailer, kBlockTrailerTag, sizeof(kBlockTrailerTag)) == 0);
-    }
-
-    static void Validate()
-    {
-        SkAutoMutexAcquire  ac(get_block_mutex());
-        InMutexValidate();
-    }
-
-private:
-    static void InMutexValidate()
-    {
-        SkBlockHeader* header = gHeader;
-        while (header != NULL) {
-            SkASSERT(memcmp(header->fHeader, kBlockHeaderTag, sizeof(kBlockHeaderTag)) == 0);
-            char* trailer = header->fTrailer + header->fSize;
-            SkASSERT(memcmp(trailer, kBlockTrailerTag, sizeof(kBlockTrailerTag)) == 0);
-            header = header->fNext;
-        }
-    }
-};
-
-void ValidateHeap();
-void ValidateHeap()
-{
-    SkBlockHeader::Validate();
-}
-#else
-void ValidateHeap() {}
-#endif
-
-void sk_throw()
-{
-    SkDEBUGFAIL("sk_throw");
-    abort();
-}
-
-void sk_out_of_memory(void)
-{
-    SkDEBUGFAIL("sk_out_of_memory");
-    abort();
-}
-
-void* sk_malloc_throw(size_t size)
-{
-    return sk_malloc_flags(size, SK_MALLOC_THROW);
-}
-
-void* sk_realloc_throw(void* addr, size_t size)
-{
-#ifdef SK_TAG_BLOCKS
-    ValidateHeap();
-    if (addr != NULL) {
-        SkBlockHeader* header = (SkBlockHeader*)
-            ((char*)addr - SK_OFFSETOF(SkBlockHeader, fTrailer));
-        header->remove();
-#ifdef SK_TRACK_ALLOC
-        printf("sk_realloc_throw %p oldSize=%zd\n", addr, header->fSize);
-#endif
-        addr = header;
-    }
-    size_t realSize = size;
-    if (size)
-        size += sizeof(SkBlockHeader);
-#endif
-
-    void* p = realloc(addr, size);
-    if (size == 0)
-    {
-        ValidateHeap();
-        return p;
-    }
-
-    if (p == NULL)
-        sk_throw();
-#ifdef SK_TAG_BLOCKS
-    else
-    {
-        SkBlockHeader* header = (SkBlockHeader*) p;
-        p = header->add(realSize);
-#ifdef SK_TRACK_ALLOC
-        printf("sk_realloc_throw %p size=%zd\n", p, realSize);
-#endif
-    }
-#endif
-    ValidateHeap();
-    return p;
-}
-
-void sk_free(void* p)
-{
-    if (p)
-    {
-        ValidateHeap();
-#ifdef SK_TAG_BLOCKS
-        SkBlockHeader* header = (SkBlockHeader*)
-            ((char*)p - SK_OFFSETOF(SkBlockHeader, fTrailer));
-        header->remove();
-#ifdef SK_TRACK_ALLOC
-        printf("sk_free %p size=%zd\n", p, header->fSize);
-#endif
-        size_t size = header->fSize + sizeof(SkBlockHeader);
-        memset(header, kDeleteFill, size);
-        p = header;
-#endif
-        ValidateHeap();
-        free(p);
-        ValidateHeap();
-    }
-}
-
-void* sk_malloc_flags(size_t size, unsigned flags)
-{
-    ValidateHeap();
-#ifdef SK_TAG_BLOCKS
-    size_t realSize = size;
-    size += sizeof(SkBlockHeader);
-#endif
-
-    void* p = malloc(size);
-    if (p == NULL)
-    {
-        if (flags & SK_MALLOC_THROW)
-            sk_throw();
-    }
-#ifdef SK_TAG_BLOCKS
-    else
-    {
-        SkBlockHeader* header = (SkBlockHeader*) p;
-        p = header->add(realSize);
-        memset(p, kByteFill, realSize);
-#ifdef SK_TRACK_ALLOC
-        printf("sk_malloc_flags %p size=%zd\n", p, realSize);
-#endif
-    }
-#endif
-    ValidateHeap();
-    return p;
-}