opencv/modules/core/src/alloc.cpp

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#include "precomp.hpp"

#ifdef HAVE_POSIX_MEMALIGN
#include <stdlib.h>
#elif defined HAVE_MALLOC_H
#include <malloc.h>
#endif

namespace cv {

static void* OutOfMemoryError(size_t size)
{
    CV_Error_(CV_StsNoMem, ("Failed to allocate %llu bytes", (unsigned long long)size));
}


void* fastMalloc( size_t size )
{
#ifdef HAVE_POSIX_MEMALIGN
    void* ptr = NULL;
    if(posix_memalign(&ptr, CV_MALLOC_ALIGN, size))
        ptr = NULL;
    if(!ptr)
        return OutOfMemoryError(size);
    return ptr;
#elif defined HAVE_MEMALIGN
    void* ptr = memalign(CV_MALLOC_ALIGN, size);
    if(!ptr)
        return OutOfMemoryError(size);
    return ptr;
#else
    uchar* udata = (uchar*)malloc(size + sizeof(void*) + CV_MALLOC_ALIGN);
    if(!udata)
        return OutOfMemoryError(size);
    uchar** adata = alignPtr((uchar**)udata + 1, CV_MALLOC_ALIGN);
    adata[-1] = udata;
    return adata;
#endif
}

void fastFree(void* ptr)
{
#if defined HAVE_POSIX_MEMALIGN || defined HAVE_MEMALIGN
    free(ptr);
#else
    if(ptr)
    {
        uchar* udata = ((uchar**)ptr)[-1];
        CV_DbgAssert(udata < (uchar*)ptr &&
               ((uchar*)ptr - udata) <= (ptrdiff_t)(sizeof(void*)+CV_MALLOC_ALIGN));
        free(udata);
    }
#endif
}

} // namespace

CV_IMPL void* cvAlloc( size_t size )
{
    return cv::fastMalloc( size );
}

CV_IMPL void cvFree_( void* ptr )
{
    cv::fastFree( ptr );
}

/* End of file. */