Cross Reference: /external/mesa3d/src/gallium/auxiliary/util/u

Lines Matching defs:ring
26    struct util_ringbuffer *ring = CALLOC_STRUCT(util_ringbuffer);
27    if (ring == NULL)
32    ring->buf = MALLOC( dwords * sizeof(unsigned) );
33    if (ring->buf == NULL)
36    ring->mask = dwords - 1;
38    pipe_condvar_init(ring->change);
39    pipe_mutex_init(ring->mutex);
40    return ring;
43    FREE(ring->buf);
44    FREE(ring);
48 void util_ringbuffer_destroy( struct util_ringbuffer *ring )
50    pipe_condvar_destroy(ring->change);
51    pipe_mutex_destroy(ring->mutex);
52    FREE(ring->buf);
53    FREE(ring);
57  * Return number of free entries in the ring
59 static INLINE unsigned util_ringbuffer_space( const struct util_ringbuffer *ring )
61    return (ring->tail - (ring->head + 1)) & ring->mask;
65  * Is the ring buffer empty?
67 static INLINE boolean util_ringbuffer_empty( const struct util_ringbuffer *ring )
69    return util_ringbuffer_space(ring) == ring->mask;
72 void util_ringbuffer_enqueue( struct util_ringbuffer *ring,
79    pipe_mutex_lock(ring->mutex);
83    assert(packet->dwords <= ring->mask);
87    while (util_ringbuffer_space(ring) < packet->dwords)
88       pipe_condvar_wait(ring->change, ring->mutex);
90    /* Copy data to ring:
98       ring->buf[ring->head] = packet[i];
99       ring->head++;
100       ring->head &= ring->mask;
105    pipe_condvar_signal(ring->change);
106    pipe_mutex_unlock(ring->mutex);
109 enum pipe_error util_ringbuffer_dequeue( struct util_ringbuffer *ring,
120    pipe_mutex_lock(ring->mutex);
122    /* Get next ring entry:
125       while (util_ringbuffer_empty(ring))
126          pipe_condvar_wait(ring->change, ring->mutex);
129       if (util_ringbuffer_empty(ring)) {
135    ring_packet = &ring->buf[ring->tail];
139    if (ring_packet->dwords > ring->mask + 1 - util_ringbuffer_space(ring) ||
146    /* Copy data from ring:
149       packet[i] = ring->buf[ring->tail];
150       ring->tail++;
151       ring->tail &= ring->mask;
157    pipe_condvar_signal(ring->change);
158    pipe_mutex_unlock(ring->mutex);