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Cleanup. Provide accurate comment on my_getevents().

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This commit is contained in:
Vladislav Vaintroub
2020-11-25 11:12:09 +01:00
parent 78df9e37a6
commit c130c60b2b
1 changed files with 10 additions and 2 deletions
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12
tpool/aio_linux.cc
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@@ -22,8 +22,14 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111 - 1301 USA*/
# include <libaio.h>
# include <sys/syscall.h>
/** A simpler alternative to io_getevents(), without
aio_ring_is_empty() that may trigger SIGSEGV */
/*
A hack, which so far seems to allow allow getevents thread to be interrupted
by io_destroy() from another thread
libaio's io_getevent() would sometimes crash when attempting this feat,
thus the raw syscall.
*/
static int my_getevents(io_context_t ctx, long min_nr, long nr, io_event *ev)
{
int saved_errno= errno;
@@ -37,6 +43,8 @@ static int my_getevents(io_context_t ctx, long min_nr, long nr, io_event *ev)
return ret;
}
#endif
/*
Linux AIO implementation, based on native AIO.
Needs libaio.h and -laio at the compile time.