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This commit is contained in:
Marc Alexander Lehmann 2019-12-28 07:37:07 +00:00
parent a5aa9f38e4
commit 2e32730964
2 changed files with 24 additions and 5 deletions
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27
ev.c
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@ -1660,7 +1660,7 @@ ecb_binary32_to_binary16 (uint32_t x)
* TODO: arm is also common nowadays, maybe even mips and x86
* TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
*/
#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__
#if __GNUC__ && __linux && ECB_AMD64 && !EV_FEATURE_CODE
/* the costly errno access probably kills this for size optimisation */
#define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
@ -2264,8 +2264,20 @@ fd_reify (EV_P)
{
int i;
/* most backends do not modify the fdchanges list in backend_modfiy.
* except io_uring, which has fixed-size buffers which might force us
* to handle events in backend_modify, causing fdchangesd to be amended,
* which could result in an endless loop.
* to avoid this, we do not dynamically handle fds that were added
* during fd_reify. that menas thast for those backends, fdchangecnt
* might be non-zero during poll, which must cause them to not block.
* to not put too much of a burden on other backends, this detail
* needs to be handled in the backend.
*/
int changecnt = fdchangecnt;
#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
for (i = 0; i < fdchangecnt; ++i)
for (i = 0; i < changecnt; ++i)
{
int fd = fdchanges [i];
ANFD *anfd = anfds + fd;
@ -2289,7 +2301,7 @@ fd_reify (EV_P)
}
#endif
for (i = 0; i < fdchangecnt; ++i)
for (i = 0; i < changecnt; ++i)
{
int fd = fdchanges [i];
ANFD *anfd = anfds + fd;
@ -2315,7 +2327,14 @@ fd_reify (EV_P)
backend_modify (EV_A_ fd, o_events, anfd->events);
}
fdchangecnt = 0;
/* normally, fdchangecnt hasn't changed. if it has, then new fds have been added.
* this is a rare case (see beginning comment in this function), so we copy them to the
* front and hope the backend handles this case.
*/
if (ecb_expect_false (fdchangecnt != changecnt))
memmove (fdchanges, fdchanges + changecnt, (fdchangecnt - changecnt) * sizeof (*fdchanges));
fdchangecnt -= changecnt;
}
/* something about the given fd changed */

2
ev_iouring.c
View File

@ -361,7 +361,7 @@ iouring_internal_init (EV_P)
return -1; /* we failed */
#if TODO
if ((~params.features) & (IORING_FEAT_NODROP | IORING_FEATURE_SINGLE_MMAP))
if ((~params.features) & (IORING_FEAT_NODROP | IORING_FEATURE_SINGLE_MMAP | IORING_FEAT_SUBMIT_STABLE))
return -1; /* we require the above features */
#endif