PeerStreamer

/*

 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

/**

 * @file mem.h

 * Memory handling functions.

 */

#ifndef FFMPEG_MEM_H

#define FFMPEG_MEM_H

#ifdef __ICC

    #define DECLARE_ALIGNED(n,t,v)      t v __attribute__ ((aligned (n)))

    #define DECLARE_ASM_CONST(n,t,v)    const t __attribute__ ((aligned (n))) v

#elif defined(__GNUC__)

    #define DECLARE_ALIGNED(n,t,v)      t v __attribute__ ((aligned (n)))

    #define DECLARE_ASM_CONST(n,t,v)    static const t v attribute_used __attribute__ ((aligned (n)))

#elif defined(_MSC_VER)

    #define DECLARE_ALIGNED(n,t,v)      __declspec(align(n)) t v

    #define DECLARE_ASM_CONST(n,t,v)    __declspec(align(n)) static const t v

#elif defined(HAVE_INLINE_ASM)

    #error The asm code needs alignment, but we do not know how to do it for this compiler.

#else

    #define DECLARE_ALIGNED(n,t,v)      t v

    #define DECLARE_ASM_CONST(n,t,v)    static const t v

#endif

#if defined(__GNUC__) && (__GNU__ > 3 || __GNU__ == 3 && __GNU_MINOR__ > 0)

    #define av_malloc_attrib __attribute__((__malloc__))

#else

    #define av_malloc_attrib

#endif

#if defined(__GNUC__) && (__GNU__ > 4 || __GNU__ == 4 && __GNU_MINOR__ > 1)

    #define av_alloc_size(n) __attribute__((alloc_size(n)))

#else

    #define av_alloc_size(n)

#endif

/**

 * Allocate a block of \p size bytes with alignment suitable for all

 * memory accesses (including vectors if available on the CPU).

 * @param size Size in bytes for the memory block to be allocated.

 * @return Pointer to the allocated block, NULL if it cannot allocate

 * it.

 * @see av_mallocz()

 */

void *av_malloc(unsigned int size) av_malloc_attrib av_alloc_size(1);

/**

 * Allocate or reallocate a block of memory.

 * If \p ptr is NULL and \p size > 0, allocate a new block. If \p

 * size is zero, free the memory block pointed by \p ptr.

 * @param size Size in bytes for the memory block to be allocated or

 * reallocated.

 * @param ptr Pointer to a memory block already allocated with

 * av_malloc(z)() or av_realloc() or NULL.

 * @return Pointer to a newly reallocated block or NULL if it cannot

 * reallocate or the function is used to free the memory block.

 * @see av_fast_realloc()

 */

void *av_realloc(void *ptr, unsigned int size) av_alloc_size(2);

/**

 * Free a memory block which has been allocated with av_malloc(z)() or

 * av_realloc().

 * @param ptr Pointer to the memory block which should be freed.

 * @note ptr = NULL is explicitly allowed.

 * @note It is recommended that you use av_freep() instead.

 * @see av_freep()

 */

void av_free(void *ptr);

/**

 * Allocate a block of \p size bytes with alignment suitable for all

 * memory accesses (including vectors if available on the CPU) and

 * set to zeroes all the bytes of the block.

 * @param size Size in bytes for the memory block to be allocated.

 * @return Pointer to the allocated block, NULL if it cannot allocate

 * it.

 * @see av_malloc()

 */

void *av_mallocz(unsigned int size) av_malloc_attrib av_alloc_size(1);

/**

 * Duplicate the string \p s.

 * @param s String to be duplicated.

 * @return Pointer to a newly allocated string containing a

 * copy of \p s or NULL if it cannot be allocated.

 */

char *av_strdup(const char *s) av_malloc_attrib;

/**

 * Free a memory block which has been allocated with av_malloc(z)() or

 * av_realloc() and set to NULL the pointer to it.

 * @param ptr Pointer to the pointer to the memory block which should

 * be freed.

 * @see av_free()

 */

void av_freep(void *ptr);

#endif /* FFMPEG_MEM_H */