diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/pthread/aio_misc.h | 2 | ||||
| -rw-r--r-- | sysdeps/pthread/aio_notify.c | 12 | ||||
| -rw-r--r-- | sysdeps/pthread/aio_suspend.c | 36 | ||||
| -rw-r--r-- | sysdeps/pthread/lio_listio.c | 12 |
4 files changed, 54 insertions, 8 deletions
diff --git a/sysdeps/pthread/aio_misc.h b/sysdeps/pthread/aio_misc.h index d9aa6e8..50962c7 100644 --- a/sysdeps/pthread/aio_misc.h +++ b/sysdeps/pthread/aio_misc.h @@ -47,7 +47,9 @@ struct waitlist struct waitlist *next; /* The next two fields is used in synchronous `lio_listio' operations. */ +#ifndef DONT_NEED_AIO_MISC_COND pthread_cond_t *cond; +#endif int *result; volatile int *counterp; diff --git a/sysdeps/pthread/aio_notify.c b/sysdeps/pthread/aio_notify.c index 4d2611f..3f7f70e 100644 --- a/sysdeps/pthread/aio_notify.c +++ b/sysdeps/pthread/aio_notify.c @@ -143,20 +143,24 @@ __aio_notify (struct requestlist *req) { struct waitlist *next = waitlist->next; - /* Decrement the counter. This is used in both cases. */ - --*waitlist->counterp; - if (waitlist->sigevp == NULL) { if (waitlist->result != NULL && aiocbp->__return_value == -1) *waitlist->result = -1; +#ifdef DONT_NEED_AIO_MISC_COND + AIO_MISC_NOTIFY (waitlist); +#else + /* Decrement the counter. */ + --*waitlist->counterp; + pthread_cond_signal (waitlist->cond); +#endif } else /* This is part of a asynchronous `lio_listio' operation. If this request is the last one, send the signal. */ - if (*waitlist->counterp == 0) + if (--*waitlist->counterp == 0) { #ifdef BROKEN_THREAD_SIGNALS __aio_notify_only (waitlist->sigevp, waitlist->caller_pid); diff --git a/sysdeps/pthread/aio_suspend.c b/sysdeps/pthread/aio_suspend.c index 9e3a1ee..b85b16d 100644 --- a/sysdeps/pthread/aio_suspend.c +++ b/sysdeps/pthread/aio_suspend.c @@ -44,7 +44,9 @@ struct clparam const struct aiocb *const *list; struct waitlist *waitlist; struct requestlist **requestlist; +#ifndef DONT_NEED_AIO_MISC_COND pthread_cond_t *cond; +#endif int nent; }; @@ -52,6 +54,12 @@ struct clparam static void cleanup (void *arg) { +#ifdef DONT_NEED_AIO_MISC_COND + /* Acquire the mutex. If pthread_cond_*wait is used this would + happen implicitly. */ + pthread_mutex_lock (&__aio_requests_mutex); +#endif + const struct clparam *param = (const struct clparam *) arg; /* Now remove the entry in the waiting list for all requests @@ -75,8 +83,10 @@ cleanup (void *arg) *listp = (*listp)->next; } +#ifndef DONT_NEED_AIO_MISC_COND /* Release the conditional variable. */ (void) pthread_cond_destroy (param->cond); +#endif /* Release the mutex. */ pthread_mutex_unlock (&__aio_requests_mutex); @@ -89,13 +99,21 @@ aio_suspend (list, nent, timeout) int nent; const struct timespec *timeout; { + if (__builtin_expect (nent < 0, 0)) + { + __set_errno (EINVAL); + return -1; + } + struct waitlist waitlist[nent]; struct requestlist *requestlist[nent]; +#ifndef DONT_NEED_AIO_MISC_COND pthread_cond_t cond = PTHREAD_COND_INITIALIZER; +#endif int cnt; bool any = false; int result = 0; - int dummy; + int cntr = 1; /* Request the mutex. */ pthread_mutex_lock (&__aio_requests_mutex); @@ -111,10 +129,12 @@ aio_suspend (list, nent, timeout) if (requestlist[cnt] != NULL) { +#ifndef DONT_NEED_AIO_MISC_COND waitlist[cnt].cond = &cond; +#endif waitlist[cnt].result = NULL; waitlist[cnt].next = requestlist[cnt]->waiting; - waitlist[cnt].counterp = &dummy; + waitlist[cnt].counterp = &cntr; waitlist[cnt].sigevp = NULL; #ifdef BROKEN_THREAD_SIGNALS waitlist[cnt].caller_pid = 0; /* Not needed. */ @@ -140,12 +160,17 @@ aio_suspend (list, nent, timeout) .list = list, .waitlist = waitlist, .requestlist = requestlist, +#ifndef DONT_NEED_AIO_MISC_COND .cond = &cond, +#endif .nent = nent }; pthread_cleanup_push (cleanup, &clparam); +#ifdef DONT_NEED_AIO_MISC_COND + AIO_MISC_WAIT (result, cntr, timeout, 1); +#else if (timeout == NULL) result = pthread_cond_wait (&cond, &__aio_requests_mutex); else @@ -167,6 +192,7 @@ aio_suspend (list, nent, timeout) result = pthread_cond_timedwait (&cond, &__aio_requests_mutex, &abstime); } +#endif pthread_cleanup_pop (0); } @@ -190,19 +216,23 @@ aio_suspend (list, nent, timeout) *listp = (*listp)->next; } +#ifndef DONT_NEED_AIO_MISC_COND /* Release the conditional variable. */ if (__builtin_expect (pthread_cond_destroy (&cond) != 0, 0)) /* This must never happen. */ abort (); +#endif if (result != 0) { - /* An error occurred. Possibly it's EINTR. We have to translate +#ifndef DONT_NEED_AIO_MISC_COND + /* An error occurred. Possibly it's ETIMEDOUT. We have to translate the timeout error report of `pthread_cond_timedwait' to the form expected from `aio_suspend'. */ if (result == ETIMEDOUT) __set_errno (EAGAIN); else +#endif __set_errno (result); result = -1; diff --git a/sysdeps/pthread/lio_listio.c b/sysdeps/pthread/lio_listio.c index d6ad5a2..39187f3 100644 --- a/sysdeps/pthread/lio_listio.c +++ b/sysdeps/pthread/lio_listio.c @@ -122,9 +122,11 @@ lio_listio_internal (int mode, struct aiocb *const list[], int nent, } else if (LIO_MODE (mode) == LIO_WAIT) { +#ifndef DONT_NEED_AIO_MISC_COND pthread_cond_t cond = PTHREAD_COND_INITIALIZER; - struct waitlist waitlist[nent]; int oldstate; +#endif + struct waitlist waitlist[nent]; total = 0; for (cnt = 0; cnt < nent; ++cnt) @@ -133,7 +135,9 @@ lio_listio_internal (int mode, struct aiocb *const list[], int nent, if (requests[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP) { +#ifndef DONT_NEED_AIO_MISC_COND waitlist[cnt].cond = &cond; +#endif waitlist[cnt].result = &result; waitlist[cnt].next = requests[cnt]->waiting; waitlist[cnt].counterp = &total; @@ -146,6 +150,9 @@ lio_listio_internal (int mode, struct aiocb *const list[], int nent, } } +#ifdef DONT_NEED_AIO_MISC_COND + AIO_MISC_WAIT (result, total, NULL, 0); +#else /* Since `pthread_cond_wait'/`pthread_cond_timedwait' are cancellation points we must be careful. We added entries to the waiting lists which we must remove. So defer cancellation for now. */ @@ -161,6 +168,7 @@ lio_listio_internal (int mode, struct aiocb *const list[], int nent, if (pthread_cond_destroy (&cond) != 0) /* This must never happen. */ abort (); +#endif /* If any of the I/O requests failed, return -1 and set errno. */ if (result != 0) @@ -193,7 +201,9 @@ lio_listio_internal (int mode, struct aiocb *const list[], int nent, if (requests[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP) { +#ifndef DONT_NEED_AIO_MISC_COND waitlist->list[cnt].cond = NULL; +#endif waitlist->list[cnt].result = NULL; waitlist->list[cnt].next = requests[cnt]->waiting; waitlist->list[cnt].counterp = &waitlist->counter; |