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author | marha <marha@users.sourceforge.net> | 2012-06-08 09:33:13 +0200 |
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committer | marha <marha@users.sourceforge.net> | 2012-06-08 09:33:13 +0200 |
commit | 990bc3f015a4f8fce2eb918375defcd44980a845 (patch) | |
tree | 8e8301f19482b52cc00bd95b4593522cc93267af /mesalib/src/gallium/auxiliary/util/u_ringbuffer.c | |
parent | 1af6fc1b5d93e54d6674de8b5870448b29f139a7 (diff) | |
download | vcxsrv-990bc3f015a4f8fce2eb918375defcd44980a845.tar.gz vcxsrv-990bc3f015a4f8fce2eb918375defcd44980a845.tar.bz2 vcxsrv-990bc3f015a4f8fce2eb918375defcd44980a845.zip |
Used synchronise script to update files
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_ringbuffer.c')
-rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_ringbuffer.c | 320 |
1 files changed, 160 insertions, 160 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_ringbuffer.c b/mesalib/src/gallium/auxiliary/util/u_ringbuffer.c index ad4066aa1..648b105b1 100644 --- a/mesalib/src/gallium/auxiliary/util/u_ringbuffer.c +++ b/mesalib/src/gallium/auxiliary/util/u_ringbuffer.c @@ -1,160 +1,160 @@ -
-#include "os/os_thread.h"
-#include "pipe/p_defines.h"
-#include "util/u_ringbuffer.h"
-#include "util/u_math.h"
-#include "util/u_memory.h"
-
-/* Generic ringbuffer:
- */
-struct util_ringbuffer
-{
- struct util_packet *buf;
- unsigned mask;
-
- /* Can this be done with atomic variables??
- */
- unsigned head;
- unsigned tail;
- pipe_condvar change;
- pipe_mutex mutex;
-};
-
-
-struct util_ringbuffer *util_ringbuffer_create( unsigned dwords )
-{
- struct util_ringbuffer *ring = CALLOC_STRUCT(util_ringbuffer);
- if (ring == NULL)
- return NULL;
-
- assert(util_is_power_of_two(dwords));
-
- ring->buf = MALLOC( dwords * sizeof(unsigned) );
- if (ring->buf == NULL)
- goto fail;
-
- ring->mask = dwords - 1;
-
- pipe_condvar_init(ring->change);
- pipe_mutex_init(ring->mutex);
- return ring;
-
-fail:
- FREE(ring->buf);
- FREE(ring);
- return NULL;
-}
-
-void util_ringbuffer_destroy( struct util_ringbuffer *ring )
-{
- pipe_condvar_destroy(ring->change);
- pipe_mutex_destroy(ring->mutex);
- FREE(ring->buf);
- FREE(ring);
-}
-
-/**
- * Return number of free entries in the ring
- */
-static INLINE unsigned util_ringbuffer_space( const struct util_ringbuffer *ring )
-{
- return (ring->tail - (ring->head + 1)) & ring->mask;
-}
-
-/**
- * Is the ring buffer empty?
- */
-static INLINE boolean util_ringbuffer_empty( const struct util_ringbuffer *ring )
-{
- return util_ringbuffer_space(ring) == ring->mask;
-}
-
-void util_ringbuffer_enqueue( struct util_ringbuffer *ring,
- const struct util_packet *packet )
-{
- unsigned i;
-
- /* XXX: over-reliance on mutexes, etc:
- */
- pipe_mutex_lock(ring->mutex);
-
- /* make sure we don't request an impossible amount of space
- */
- assert(packet->dwords <= ring->mask);
-
- /* Wait for free space:
- */
- while (util_ringbuffer_space(ring) < packet->dwords)
- pipe_condvar_wait(ring->change, ring->mutex);
-
- /* Copy data to ring:
- */
- for (i = 0; i < packet->dwords; i++) {
-
- /* Copy all dwords of the packet. Note we're abusing the
- * typesystem a little - we're being passed a pointer to
- * something, but probably not an array of packet structs:
- */
- ring->buf[ring->head] = packet[i];
- ring->head++;
- ring->head &= ring->mask;
- }
-
- /* Signal change:
- */
- pipe_condvar_signal(ring->change);
- pipe_mutex_unlock(ring->mutex);
-}
-
-enum pipe_error util_ringbuffer_dequeue( struct util_ringbuffer *ring,
- struct util_packet *packet,
- unsigned max_dwords,
- boolean wait )
-{
- const struct util_packet *ring_packet;
- unsigned i;
- int ret = PIPE_OK;
-
- /* XXX: over-reliance on mutexes, etc:
- */
- pipe_mutex_lock(ring->mutex);
-
- /* Get next ring entry:
- */
- if (wait) {
- while (util_ringbuffer_empty(ring))
- pipe_condvar_wait(ring->change, ring->mutex);
- }
- else {
- if (util_ringbuffer_empty(ring)) {
- ret = PIPE_ERROR_OUT_OF_MEMORY;
- goto out;
- }
- }
-
- ring_packet = &ring->buf[ring->tail];
-
- /* Both of these are considered bugs. Raise an assert on debug builds.
- */
- if (ring_packet->dwords > ring->mask + 1 - util_ringbuffer_space(ring) ||
- ring_packet->dwords > max_dwords) {
- assert(0);
- ret = PIPE_ERROR_BAD_INPUT;
- goto out;
- }
-
- /* Copy data from ring:
- */
- for (i = 0; i < ring_packet->dwords; i++) {
- packet[i] = ring->buf[ring->tail];
- ring->tail++;
- ring->tail &= ring->mask;
- }
-
-out:
- /* Signal change:
- */
- pipe_condvar_signal(ring->change);
- pipe_mutex_unlock(ring->mutex);
- return ret;
-}
+ +#include "os/os_thread.h" +#include "pipe/p_defines.h" +#include "util/u_ringbuffer.h" +#include "util/u_math.h" +#include "util/u_memory.h" + +/* Generic ringbuffer: + */ +struct util_ringbuffer +{ + struct util_packet *buf; + unsigned mask; + + /* Can this be done with atomic variables?? + */ + unsigned head; + unsigned tail; + pipe_condvar change; + pipe_mutex mutex; +}; + + +struct util_ringbuffer *util_ringbuffer_create( unsigned dwords ) +{ + struct util_ringbuffer *ring = CALLOC_STRUCT(util_ringbuffer); + if (ring == NULL) + return NULL; + + assert(util_is_power_of_two(dwords)); + + ring->buf = MALLOC( dwords * sizeof(unsigned) ); + if (ring->buf == NULL) + goto fail; + + ring->mask = dwords - 1; + + pipe_condvar_init(ring->change); + pipe_mutex_init(ring->mutex); + return ring; + +fail: + FREE(ring->buf); + FREE(ring); + return NULL; +} + +void util_ringbuffer_destroy( struct util_ringbuffer *ring ) +{ + pipe_condvar_destroy(ring->change); + pipe_mutex_destroy(ring->mutex); + FREE(ring->buf); + FREE(ring); +} + +/** + * Return number of free entries in the ring + */ +static INLINE unsigned util_ringbuffer_space( const struct util_ringbuffer *ring ) +{ + return (ring->tail - (ring->head + 1)) & ring->mask; +} + +/** + * Is the ring buffer empty? + */ +static INLINE boolean util_ringbuffer_empty( const struct util_ringbuffer *ring ) +{ + return util_ringbuffer_space(ring) == ring->mask; +} + +void util_ringbuffer_enqueue( struct util_ringbuffer *ring, + const struct util_packet *packet ) +{ + unsigned i; + + /* XXX: over-reliance on mutexes, etc: + */ + pipe_mutex_lock(ring->mutex); + + /* make sure we don't request an impossible amount of space + */ + assert(packet->dwords <= ring->mask); + + /* Wait for free space: + */ + while (util_ringbuffer_space(ring) < packet->dwords) + pipe_condvar_wait(ring->change, ring->mutex); + + /* Copy data to ring: + */ + for (i = 0; i < packet->dwords; i++) { + + /* Copy all dwords of the packet. Note we're abusing the + * typesystem a little - we're being passed a pointer to + * something, but probably not an array of packet structs: + */ + ring->buf[ring->head] = packet[i]; + ring->head++; + ring->head &= ring->mask; + } + + /* Signal change: + */ + pipe_condvar_signal(ring->change); + pipe_mutex_unlock(ring->mutex); +} + +enum pipe_error util_ringbuffer_dequeue( struct util_ringbuffer *ring, + struct util_packet *packet, + unsigned max_dwords, + boolean wait ) +{ + const struct util_packet *ring_packet; + unsigned i; + int ret = PIPE_OK; + + /* XXX: over-reliance on mutexes, etc: + */ + pipe_mutex_lock(ring->mutex); + + /* Get next ring entry: + */ + if (wait) { + while (util_ringbuffer_empty(ring)) + pipe_condvar_wait(ring->change, ring->mutex); + } + else { + if (util_ringbuffer_empty(ring)) { + ret = PIPE_ERROR_OUT_OF_MEMORY; + goto out; + } + } + + ring_packet = &ring->buf[ring->tail]; + + /* Both of these are considered bugs. Raise an assert on debug builds. + */ + if (ring_packet->dwords > ring->mask + 1 - util_ringbuffer_space(ring) || + ring_packet->dwords > max_dwords) { + assert(0); + ret = PIPE_ERROR_BAD_INPUT; + goto out; + } + + /* Copy data from ring: + */ + for (i = 0; i < ring_packet->dwords; i++) { + packet[i] = ring->buf[ring->tail]; + ring->tail++; + ring->tail &= ring->mask; + } + +out: + /* Signal change: + */ + pipe_condvar_signal(ring->change); + pipe_mutex_unlock(ring->mutex); + return ret; +} |