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/cvs/libev/ev_linuxaio.c
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Comparing libev/ev_linuxaio.c (file contents):
Revision 1.22 by root, Mon Jun 24 21:27:57 2019 UTC vs.
Revision 1.24 by root, Mon Jun 24 22:27:29 2019 UTC

… …
127 127
128inline_size 128inline_size
129void 129void
130linuxaio_array_needsize_iocbp (ANIOCBP *base, int offset, int count) 130linuxaio_array_needsize_iocbp (ANIOCBP *base, int offset, int count)
131{ 131{
132 /* TODO: quite the overhead to allocate every iocb separately, maybe use our own alocator? */
133 while (count--) 132 while (count--)
134 { 133 {
134 /* TODO: quite the overhead to allocate every iocb separately, maybe use our own alocator? */
135 ANIOCBP iocb = (ANIOCBP)ev_malloc (sizeof (*iocb)); 135 ANIOCBP iocb = (ANIOCBP)ev_malloc (sizeof (*iocb));
136 136
137 /* full zero initialise is probably not required at the moment, but 137 /* full zero initialise is probably not required at the moment, but
138 * this is not well documented, so we better do it. 138 * this is not well documented, so we better do it.
139 */ 139 */
… …
299 { 299 {
300 linuxaio_parse_events (EV_A_ ring->io_events + head, ring->nr - head); 300 linuxaio_parse_events (EV_A_ ring->io_events + head, ring->nr - head);
301 linuxaio_parse_events (EV_A_ ring->io_events, tail); 301 linuxaio_parse_events (EV_A_ ring->io_events, tail);
302 } 302 }
303 303
304 /* TODO: we only need a compiler barrier here, not a read fence */
305 ECB_MEMORY_FENCE_RELEASE; 304 ECB_MEMORY_FENCE_RELAXED;
306 /* as an extension to C, we hope that the volatile will make this atomic and once-only */ 305 /* as an extension to C, we hope that the volatile will make this atomic and once-only */
307 *(volatile unsigned *)&ring->head = tail; 306 *(volatile unsigned *)&ring->head = tail;
308 /* make sure kernel can see our new head value - probably not required */ 307 /* make sure kernel can see our new head value - probably not required */
309 ECB_MEMORY_FENCE_RELEASE; 308 ECB_MEMORY_FENCE_RELEASE;
310 309

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