gmio/src/gmio_core/buffer.c
2015-03-30 16:37:47 +02:00

81 lines
2.2 KiB
C

/****************************************************************************
** GeomIO Library
** Copyright FougSys (2 Mar. 2015)
** contact@fougsys.fr
**
** This software is a reusable library whose purpose is to provide complete
** I/O support for various CAD file formats (eg. STL)
**
** This software is governed by the CeCILL-B license under French law and
** abiding by the rules of distribution of free software. You can use,
** modify and/ or redistribute the software under the terms of the CeCILL-B
** license as circulated by CEA, CNRS and INRIA at the following URL
** "http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html".
****************************************************************************/
#include "buffer.h"
#include <stdlib.h>
#if defined(GMIO_HAVE_BSD_ALLOCA_FUNC)
# include <alloca.h>
#elif defined(GMIO_HAVE_WIN_ALLOCA_FUNC)
# include "error.h"
# include <windows.h>
# include <malloc.h>
#endif
GMIO_INLINE static gmio_buffer_t gmio_buffer_null()
{
gmio_buffer_t buff = { 0 };
return buff;
}
gmio_buffer_t gmio_buffer(void* ptr, size_t size)
{
gmio_buffer_t buff;
buff.ptr = ptr;
buff.size = size;
buff.deallocate_func = NULL;
return buff;
}
gmio_buffer_t gmio_buffer_malloc(size_t size)
{
gmio_buffer_t buff = gmio_buffer(malloc(size), size);
buff.deallocate_func = &free;
return buff;
}
gmio_buffer_t gmio_buffer_calloc(size_t num, size_t size)
{
gmio_buffer_t buff = gmio_buffer(calloc(num, size), num * size);
buff.deallocate_func = &free;
return buff;
}
gmio_buffer_t gmio_buffer_alloca(size_t size)
{
#if defined(GMIO_HAVE_BSD_ALLOCA_FUNC)
return gmio_buffer(alloca(size), size);
#elif defined(GMIO_HAVE_WIN_ALLOCA_FUNC)
__try {
return gmio_buffer(_alloca(size), size);
}
__except(GetExceptionCode() == STATUS_STACK_OVERFLOW) {
/* The stack overflowed */
if (_resetstkoflw() == 0)
exit(GMIO_UNKNOWN_ERROR);
return gmio_buffer_null();
}
#else
return gmio_buffer_null();
#endif
}
void gmio_buffer_deallocate(gmio_buffer_t *buffer)
{
if (buffer != NULL && buffer->deallocate_func != NULL)
buffer->deallocate_func(buffer->ptr);
}