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Merge commit '27079a426c9d3db918b158976e44b9b143d78e1c'

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* commit '27079a426c9d3db918b158976e44b9b143d78e1c':
  buffer: convert to stdatomic

Merged-by: Clément Bœsch <u@pkh.me>
This commit is contained in:
Clément Bœsch 2017-03-22 17:46:01 +01:00
commit 443e969293
2 changed files with 15 additions and 13 deletions
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23
libavutil/buffer.c
View File

@ -16,10 +16,10 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/ */
#include <stdatomic.h>
#include <stdint.h> #include <stdint.h>
#include <string.h> #include <string.h>
#include "atomic.h"
#include "buffer_internal.h" #include "buffer_internal.h"
#include "common.h" #include "common.h"
#include "mem.h" #include "mem.h"
@ -40,7 +40,8 @@ AVBufferRef *av_buffer_create(uint8_t *data, int size,
buf->size = size; buf->size = size;
buf->free = free ? free : av_buffer_default_free; buf->free = free ? free : av_buffer_default_free;
buf->opaque = opaque; buf->opaque = opaque;
buf->refcount = 1;
atomic_init(&buf->refcount, 1);
if (flags & AV_BUFFER_FLAG_READONLY) if (flags & AV_BUFFER_FLAG_READONLY)
buf->flags |= BUFFER_FLAG_READONLY; buf->flags |= BUFFER_FLAG_READONLY;
@ -98,7 +99,7 @@ AVBufferRef *av_buffer_ref(AVBufferRef *buf)
*ret = *buf; *ret = *buf;
avpriv_atomic_int_add_and_fetch(&buf->buffer->refcount, 1); atomic_fetch_add_explicit(&buf->buffer->refcount, 1, memory_order_relaxed);
return ret; return ret;
} }
@ -115,7 +116,7 @@ static void buffer_replace(AVBufferRef **dst, AVBufferRef **src)
} else } else
av_freep(dst); av_freep(dst);
if (!avpriv_atomic_int_add_and_fetch(&b->refcount, -1)) { if (atomic_fetch_add_explicit(&b->refcount, -1, memory_order_acq_rel) == 1) {
b->free(b->opaque, b->data); b->free(b->opaque, b->data);
av_freep(&b); av_freep(&b);
} }
@ -134,7 +135,7 @@ int av_buffer_is_writable(const AVBufferRef *buf)
if (buf->buffer->flags & AV_BUFFER_FLAG_READONLY) if (buf->buffer->flags & AV_BUFFER_FLAG_READONLY)
return 0; return 0;
return avpriv_atomic_int_get(&buf->buffer->refcount) == 1; return atomic_load(&buf->buffer->refcount) == 1;
} }
void *av_buffer_get_opaque(const AVBufferRef *buf) void *av_buffer_get_opaque(const AVBufferRef *buf)
@ -144,7 +145,7 @@ void *av_buffer_get_opaque(const AVBufferRef *buf)
int av_buffer_get_ref_count(const AVBufferRef *buf) int av_buffer_get_ref_count(const AVBufferRef *buf)
{ {
return buf->buffer->refcount; return atomic_load(&buf->buffer->refcount);
} }
int av_buffer_make_writable(AVBufferRef **pbuf) int av_buffer_make_writable(AVBufferRef **pbuf)
@ -229,7 +230,7 @@ AVBufferPool *av_buffer_pool_init2(int size, void *opaque,
pool->alloc2 = alloc; pool->alloc2 = alloc;
pool->pool_free = pool_free; pool->pool_free = pool_free;
avpriv_atomic_int_set(&pool->refcount, 1); atomic_init(&pool->refcount, 1);
return pool; return pool;
} }
@ -245,7 +246,7 @@ AVBufferPool *av_buffer_pool_init(int size, AVBufferRef* (*alloc)(int size))
pool->size = size; pool->size = size;
pool->alloc = alloc ? alloc : av_buffer_alloc; pool->alloc = alloc ? alloc : av_buffer_alloc;
avpriv_atomic_int_set(&pool->refcount, 1); atomic_init(&pool->refcount, 1);
return pool; return pool;
} }
@ -280,7 +281,7 @@ void av_buffer_pool_uninit(AVBufferPool **ppool)
pool = *ppool; pool = *ppool;
*ppool = NULL; *ppool = NULL;
if (!avpriv_atomic_int_add_and_fetch(&pool->refcount, -1)) if (atomic_fetch_add_explicit(&pool->refcount, -1, memory_order_acq_rel) == 1)
buffer_pool_free(pool); buffer_pool_free(pool);
} }
@ -297,7 +298,7 @@ static void pool_release_buffer(void *opaque, uint8_t *data)
pool->pool = buf; pool->pool = buf;
ff_mutex_unlock(&pool->mutex); ff_mutex_unlock(&pool->mutex);
if (!avpriv_atomic_int_add_and_fetch(&pool->refcount, -1)) if (atomic_fetch_add_explicit(&pool->refcount, -1, memory_order_acq_rel) == 1)
buffer_pool_free(pool); buffer_pool_free(pool);
} }
@ -350,7 +351,7 @@ AVBufferRef *av_buffer_pool_get(AVBufferPool *pool)
ff_mutex_unlock(&pool->mutex); ff_mutex_unlock(&pool->mutex);
if (ret) if (ret)
avpriv_atomic_int_add_and_fetch(&pool->refcount, 1); atomic_fetch_add_explicit(&pool->refcount, 1, memory_order_relaxed);
return ret; return ret;
} }

5
libavutil/buffer_internal.h
View File

@ -19,6 +19,7 @@
#ifndef AVUTIL_BUFFER_INTERNAL_H #ifndef AVUTIL_BUFFER_INTERNAL_H
#define AVUTIL_BUFFER_INTERNAL_H #define AVUTIL_BUFFER_INTERNAL_H
#include <stdatomic.h>
#include <stdint.h> #include <stdint.h>
#include "buffer.h" #include "buffer.h"
@ -40,7 +41,7 @@ struct AVBuffer {
/** /**
* number of existing AVBufferRef instances referring to this buffer * number of existing AVBufferRef instances referring to this buffer
*/ */
volatile int refcount; atomic_uint refcount;
/** /**
* a callback for freeing the data * a callback for freeing the data
@ -85,7 +86,7 @@ struct AVBufferPool {
* buffers have been released, then it's safe to free the pool and all * buffers have been released, then it's safe to free the pool and all
* the buffers in it. * the buffers in it.
*/ */
volatile int refcount; atomic_uint refcount;
int size; int size;
void *opaque; void *opaque;