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authorUlrich Drepper <drepper@redhat.com>1997-12-08 03:06:47 +0000
committerUlrich Drepper <drepper@redhat.com>1997-12-08 03:06:47 +0000
commitd71b808a96f0fd1b6cd82c41698b518bf345692b (patch)
tree7b86cfd6b465c72888d7e85a61c08cafabf5747b /rt/aio_cancel.c
parent6195235142bd246d972cf1d88b4e208071a3e318 (diff)
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1997-12-08 03:24 Ulrich Drepper <drepper@cygnus.com> * Makeconfig: Define $(rt) to rt if linuxthreads is available. * Makefile (subdirs): Replace rt by $(rt). * shlib-versions: Use version .2 for NSS modules. * grp/fgetgrent_r.c (LINE_PARSER): Call parse_line with extra argument. * pwd/fgetpwent_r.c: Likewise. * spwd/fgetspent_r.c: Likewise. * spwd/sgetspent_r.c: Likewise. * hesiod/nss_hesiod/hesiod-grp.c (lookup): Add new argument. Store error number in *ERRNOP. Little optimization. * hesiod/nss_hesiod/hesiod-pwd.c: Likewise. * hesiod/nss_hesiod/hesiod-service.c: Likewise. * inet/getnetgrent_r.c (__internal_setnetgrent_reuse): Likewise. (__internal_getnetgrent_r): New argument. Call __internal_setnetgrent_reuse with new argument. (__getnetgrent_r): Call __internal_getnetgrent_r with new argument. * inet/netgroup.h: Add argument to prototypes. * nis/nisplus-parser.h: Likewise. * nis/nss_compat/compat-grp.c: Change everything to store error code through provided pointer and not use errno. * nis/nss_compat/compat-pwd.c: Likewise. * nis/nss_compat/compat-spwd.c: Likewise. * nis/nss_nis/nis-alias.c: Likewise. * nis/nss_nis/nis-ethers.c: Likewise. * nis/nss_nis/nis-grp.c: Likewise. * nis/nss_nis/nis-hosts.c: Likewise. * nis/nss_nis/nis-netgrp.c: Likewise. * nis/nss_nis/nis-network.c: Likewise. * nis/nss_nis/nis-proto.c: Likewise. * nis/nss_nis/nis-publickey.c: Likewise. * nis/nss_nis/nis-pwd.c: Likewise. * nis/nss_nis/nis-rpc.c: Likewise. * nis/nss_nis/nis-service.c: Likewise. * nis/nss_nis/nis-spwd.c: Likewise. * nis/nss_nisplus/nisplus-alias.c: Likewise. * nis/nss_nisplus/nisplus-ethers.c: Likewise. * nis/nss_nisplus/nisplus-grp.c: Likewise. * nis/nss_nisplus/nisplus-hosts.c: Likewise. * nis/nss_nisplus/nisplus-netgrp.c: Likewise. * nis/nss_nisplus/nisplus-network.c: Likewise. * nis/nss_nisplus/nisplus-parser.c: Likewise. * nis/nss_nisplus/nisplus-proto.c: Likewise. * nis/nss_nisplus/nisplus-publickey.c: Likewise. * nis/nss_nisplus/nisplus-pwd.c: Likewise. * nis/nss_nisplus/nisplus-rpc.c: Likewise. * nis/nss_nisplus/nisplus-service.c: Likewise. * nis/nss_nisplus/nisplus-spwd.c: Likewise. * nss/nss_db/db-XXX.c: Likewise. * nss/nss_db/db-alias.c: Likewise. * nss/nss_db/db-netgrp.c: Likewise. * nss/nss_files/files-XXX.c: Likewise * nss/nss_files/files-alias.c: Likewise * nss/nss_files/files-netgrp.c: Likewise * nss/nss_files/files-parse.c: Likewise * nss/getXXbyYY_r.c: Call with __errno_location() as value for new parameter of get functions. * nss/getXXent_r.c: Likewise. * localedata/tst-fmon.c: Print debug info if test fails. * rt/Makefile (routines): Add aio_notify. * rt/aio.h: Remove non-public definitions. Add aioinit stuff. * rt/aio_cancel.c: Rewrite to support lio_listio and aio_suspend. * rt/aio_fsync.c: Likewise. * rt/aio_misc.c: Likewise. * rt/aio_misc.h: Likewise. * rt/aio_read.c: Likewise. * rt/aio_read64.c: Likewise. * rt/aio_suspend.c: Likewise. * rt/aio_write.c: Likewise. * rt/aio_write64.c: Likewise. * rt/lio_listio.c: Likewise. * rt/lio_listio64.c: Likewise. * rt/aio_notify.c: New file. * sysdeps/generic/bits/sigset.h: Pretty print. * sysdeps/posix/pwrite.c: Define weak alias only if function is really defined as __pwrite. * sysdeps/unix/sysv/linux/pread.c: Rewrite to use syscall directly instead of pread64. * sysdeps/unix/sysv/linux/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=signal] (sysdep_routines): Add rt_sigpending and rt_sigreturn. * sysdeps/unix/sysv/linux/sigaction.c: Use correct value for sigset_t size in syscall. * sysdeps/unix/sysv/linux/sigpending.c: Likewise. * sysdeps/unix/sysv/linux/sigprocmask.c: Likewise. * sysdeps/unix/sysv/linux/sigreturn.c: Likewise. * sysdeps/unix/sysv/linux/sigsuspend.c: Likewise. * sysdeps/unix/sysv/linux/sigtimedwait.c: Likewise. * sysdeps/unix/sysv/linux/sigwaitinfo.c: Likewise. * sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise. Take care for ACT being NULL. * sysdeps/unix/sysv/linux/syscalls.list: Don't mention user for RT signals. * sysdeps/unix/sysv/linux/i386/s_pread64.s: Return ENOSYS if __NR_pread is not defined. * sysdeps/unix/sysv/linux/i386/s_pwrite64.s: Return ENOSYS if __NR_pwrite is not defined. 1997-12-07 11:15 Thorsten Kukuk <kukuk@vt.uni-paderborn.de> * nis/nss_compat/compat-grp.c: If buffer is to small, set the file handle for /etc/group back in some more cases. * nis/nss_compat/compat-pwd.c: If buffer is to small, set the file handle for /etc/passwd back in some more cases. * nis/nss_compat/compat-spwd.c: If buffer is to small, set the file handle for /etc/shadow back in some more cases. 1997-12-06 17:00 H.J. Lu <hjl@gnu.org> * sysdeps/posix/sigblock.c (__sigblock): Don't check int mask beyound its size. * sysdeps/posix/sigsetmask.c (__sigsetmask): Ditto. * sysdeps/posix/sigvec.c (convert_mask, __sigvec): Ditto. 1997-12-06 04:38 Ulrich Drepper <drepper@cygnus.com> * sysdeps/wordsize-32/inttypes.h: Rewrite {str,wcs}to{i,u}max handling. Don't use macros, we need functions. Use inline functions for optimization. * sysdeps/wordsize-64/inttypes.h: Likewise. * sysdeps/wordsize-32/Makefile: Add strtoimax, stroumax, wcstoimax, and wcstoumax. * sysdeps/wordsize-64/Makefile: Likewise. * sysdeps/wordsize-32/Dist: Likewise. * sysdeps/wordsize-64/Dist: Likewise. * sysdeps/wordsize-32/strtoimax.c: New file. * sysdeps/wordsize-32/strtoumax.c: New file. * sysdeps/wordsize-32/wcstoimax.c: New file. * sysdeps/wordsize-32/wcstoumax.c: New file. * sysdeps/wordsize-64/strtoimax.c: New file. * sysdeps/wordsize-64/strtoumax.c: New file. * sysdeps/wordsize-64/wcstoimax.c: New file. * sysdeps/wordsize-64/wcstoumax.c: New file. 1997-12-04 10:40 Philip Blundell <pb@nexus.co.uk> * sysdeps/generic/wait3.c (__wait3): Use ANSI-style definition so that transparent union works. * sysdeps/generic/wait4.c (__wait4): Likewise. * sysdeps/generic/wait.c (__wait): Likewise. * sysdeps/generic/getpeername.c (getpeername): Use socklen_t not size_t. * sysdeps/generic/syscall.c (syscall): Return value and arg are long, to match prototype. * malloc/malloc.c (HAVE_MREMAP): Set to 0 for ARM, as we don't have mremap() yet. * sysdeps/generic/usleep.c (usleep): Returns void, to match prototype. * sysdeps/unix/sysv/linux/arm/syscalls.list: New file. * sysdeps/generic/bits/time.h: Use __time_t not time_t. * sysdeps/generic/bits/resource.h: Include <bits/types.h> for __rlim_t. * sysdeps/standalone/arm/bits/errno.h (ENOTTY): Added. * sysdeps/generic/bits/dirent.h (struct dirent64): Added. * io/sys/stat.h (S_ISLNK): Always false if we don't have __S_IFLNK. * sysdeps/standalone/close.c (_STDIO_H): Define before including <bits/stdio_lim.h>. * sysdeps/standalone/filedesc.h (_STDIO_H): Likewise. 1997-12-06 01:09 Ulrich Drepper <drepper@cygnus.com> * posix/sys/wait.h: Don't use transparent unions in C++. 1997-12-05 Andreas Jaeger <aj@arthur.rhein-neckar.de> * time/time.h: Add strfxtime. * libc.map: Add tcgetsid, strcasestr, wmemrtombs, wmemrtowcs, sysv_signal, strfxtime, pread64, pwrite64. 1997-11-30 21:57 Richard Henderson <rth@cygnus.com> Alpha changes for EGCS: * config.h.in (ASM_ALPHA_NG_SYMBOL_PREFIX): New entry. * configure.in (libc_cv_gcc_alpha_ng_prefix): New check. * sysdeps/alpha/dl-machine.h (_dl_runtime_resolve): Care for prefix. (_start): Likewise. * sysdeps/unix/sysv/linux/alpha/init-first.h: Likewise.
Diffstat (limited to 'rt/aio_cancel.c')
-rw-r--r--rt/aio_cancel.c195
1 files changed, 86 insertions, 109 deletions
diff --git a/rt/aio_cancel.c b/rt/aio_cancel.c
index f2d9389..e802a85 100644
--- a/rt/aio_cancel.c
+++ b/rt/aio_cancel.c
@@ -30,7 +30,6 @@
#undef aio_cancel64
#include <errno.h>
-#include <pthread.h>
#include "aio_misc.h"
@@ -43,128 +42,106 @@ aio_cancel (fildes, aiocbp)
int fildes;
struct aiocb *aiocbp;
{
- struct aiocb *firstp;
+ struct requestlist *req = NULL;
int result = AIO_ALLDONE;
- /* Request the semaphore. */
- sem_wait (&__aio_requests_sema);
+ /* Request the mutex. */
+ pthread_mutex_lock (&__aio_requests_mutex);
- /* Search for the list of requests associated with the given file
- descriptor. */
- for (firstp = (struct aiocb *) __aio_requests; firstp != NULL;
- firstp = firstp->__next_fd)
- if (firstp->aio_fildes == fildes)
- break;
-
- /* If the file descriptor is not found all work seems to done
- already. Otherwise try to cancel the request(s). */
- if (firstp != NULL)
+ /* We are asked to cancel a specific AIO request. */
+ if (aiocbp != NULL)
{
- if (aiocbp != NULL)
+ /* If the AIO request is not for this descriptor it has no value
+ to look for the request block. */
+ if (aiocbp->aio_fildes == fildes)
{
- /* Locate the entry corresponding to the AIOCBP parameter. */
- if (aiocbp == firstp)
- /* The requests is currently handled, therefore don't
- cancel it and signal this to the user. */
- result = AIO_NOTCANCELED;
- else
+ struct requestlist *last = NULL;
+
+ req = __aio_find_req_fd (fildes);
+
+ while (req->aiocbp != (aiocb_union *) aiocbp)
{
- while (firstp->__next_prio != NULL
- && aiocbp != firstp->__next_prio)
- firstp = firstp->__next_prio;
-
- if (firstp->__next_prio != NULL)
- {
- /* The request the user wants to cancel is in the
- queue. Simply remove it. */
- firstp->__next_prio = aiocbp->__next_prio;
-
- /* Mark as canceled. */
- aiocbp->__error_code = ECANCELED;
- aiocbp->__return_value = -1;
-
- /* Send the signal to notify about canceled
- processing of the request. */
- if (aiocbp->aio_sigevent.sigev_notify == SIGEV_THREAD)
- {
- /* We have to start a thread. */
- pthread_t tid;
- pthread_attr_t attr, *pattr;
-
- pattr = (pthread_attr_t *)
- aiocbp->aio_sigevent.sigev_notify_attributes;
- if (pattr == NULL)
- {
- pthread_attr_init (&attr);
- pthread_attr_setdetachstate (&attr,
- PTHREAD_CREATE_DETACHED);
- pattr = &attr;
- }
-
- pthread_create (&tid, pattr,
- (void *(*) (void *))
- aiocbp->aio_sigevent.sigev_notify_function,
- aiocbp->aio_sigevent.sigev_value.sival_ptr);
- }
- else if (aiocbp->aio_sigevent.sigev_notify == SIGEV_SIGNAL)
- /* We have to send a signal. */
- __aio_sigqueue (aiocbp->aio_sigevent.sigev_signo,
- aiocbp->aio_sigevent.sigev_value);
-
- result = AIO_CANCELED;
- }
+ last = req;
+ req = req->next_prio;
}
- }
- else
- {
- /* First dequeue all waiting requests. */
- aiocbp = firstp;
- while ((firstp = firstp->__next_prio) != NULL)
+ /* Don't remove the entry if a thread is already working on it. */
+ if (req->running == allocated)
+ result = AIO_NOTCANCELED;
+ else
{
- firstp->__error_code = ECANCELED;
- firstp->__return_value = -1;
-
-
- /* Send the signal to notify about canceled processing
- of the request. */
- if (firstp->aio_sigevent.sigev_notify == SIGEV_THREAD)
- {
- /* We have to start a thread. */
- pthread_t tid;
- pthread_attr_t attr, *pattr;
-
- pattr = (pthread_attr_t *)
- aiocbp->aio_sigevent.sigev_notify_attributes;
- if (pattr == NULL)
- {
- pthread_attr_init (&attr);
- pthread_attr_setdetachstate (&attr,
- PTHREAD_CREATE_DETACHED);
- pattr = &attr;
- }
-
- pthread_create (&tid, pattr,
- (void *(*) (void *))
- firstp->aio_sigevent.sigev_notify_function,
- firstp->aio_sigevent.sigev_value.sival_ptr);
- }
- else if (firstp->aio_sigevent.sigev_notify == SIGEV_SIGNAL)
- /* We have to send a signal. */
- __aio_sigqueue (firstp->aio_sigevent.sigev_signo,
- firstp->aio_sigevent.sigev_value);
+ /* We can remove the entry. */
+ if (last != NULL)
+ last->next_prio = req->next_prio;
+ else
+ if (req->next_prio == NULL)
+ {
+ if (req->last_fd != NULL)
+ req->last_fd->next_fd = req->next_fd;
+ if (req->next_fd != NULL)
+ req->next_fd->last_fd = req->last_fd;
+ }
+ else
+ {
+ if (req->last_fd != NULL)
+ req->last_fd->next_fd = req->next_prio;
+ if (req->next_fd != NULL)
+ req->next_fd->last_fd = req->next_prio;
+ req->next_prio->last_fd = req->last_fd;
+ req->next_prio->next_fd = req->next_fd;
+
+ /* Mark this entry as runnable. */
+ req->next_prio->running = yes;
+ }
+
+ result = AIO_CANCELED;
}
- /* We have to signal that not all requests could be canceled
- since the first requests is currently processed. */
- result = AIO_NOTCANCELED;
-
- aiocbp->__next_prio = NULL;
+ req->next_prio = NULL;
}
}
+ else
+ {
+ /* Find the beginning of the list of all requests for this
+ desriptor. */
+ req = __aio_find_req_fd (fildes);
+
+ /* If any request is worked on by a thread it must be the first.
+ So either we can delete all requests or all but the first. */
+ if (req != NULL)
+ if (req->running == allocated)
+ {
+ struct requestlist *old = req;
+ req = req->next_prio;
+ old->next_prio = NULL;
+
+ result = AIO_NOTCANCELED;
+ }
+ else
+ {
+ /* Remove entry from the file descriptor list. */
+ if (req->last_fd != NULL)
+ req->last_fd->next_fd = req->next_fd;
+ if (req->next_fd != NULL)
+ req->next_fd->last_fd = req->last_fd;
+
+ result = AIO_CANCELED;
+ }
+ }
+
+ /* Mark requests as canceled and send signal. */
+ while (req != NULL)
+ {
+ struct requestlist *old = req;
+ req->aiocbp->aiocb.__error_code = ECANCELED;
+ req->aiocbp->aiocb.__return_value = -1;
+ __aio_notify (req);
+ req = req->next_prio;
+ __aio_free_request (old);
+ }
- /* Release the semaphore. */
- sem_post (&__aio_requests_sema);
+ /* Release the mutex. */
+ pthread_mutex_unlock (&__aio_requests_mutex);
return result;
}