sky/engine/wtf/FastMalloc.cpp

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#include "sky/engine/wtf/FastMalloc.h"

#include <string.h>
#include "sky/engine/wtf/PartitionAlloc.h"
#include "sky/engine/wtf/SpinLock.h"

namespace WTF {

static PartitionAllocatorGeneric gPartition;
static int gLock = 0;
static bool gInitialized = false;

void* fastZeroedMalloc(size_t n)
{
    void* result = fastMalloc(n);
    memset(result, 0, n);
    return result;
}

char* fastStrDup(const char* src)
{
    size_t len = strlen(src) + 1;
    char* dup = static_cast<char*>(fastMalloc(len));
    memcpy(dup, src, len);
    return dup;
}

void fastMallocShutdown()
{
    gPartition.shutdown();
}

void* fastMalloc(size_t n)
{
    if (UNLIKELY(!gInitialized)) {
        spinLockLock(&gLock);
        if (!gInitialized) {
            gInitialized = true;
            gPartition.init();
        }
        spinLockUnlock(&gLock);
    }
    return partitionAllocGeneric(gPartition.root(), n);
}

void fastFree(void* p)
{
    partitionFreeGeneric(gPartition.root(), p);
}

void* fastRealloc(void* p, size_t n)
{
    return partitionReallocGeneric(gPartition.root(), p, n);
}

} // namespace WTF