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Update. 

* manual/job.texi: Fix typos.
	* manual/process.texi: Likewise.
	* manual/signal.texi: Likewise.
This commit is contained in:
Ulrich Drepper 2000-02-15 01:39:39 +00:00
parent 7c437eb803
commit a496e4ce95
5 changed files with 57 additions and 95 deletions
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4
ChangeLog
View File

@ -1,5 +1,9 @@
2000-02-14 Ulrich Drepper <drepper@redhat.com>
* manual/job.texi: Fix typos.
* manual/process.texi: Likewise.
* manual/signal.texi: Likewise.
* sysdeps/powerpc/atomicity.h: Remove white space to avoid
compiler warning.

132
linuxthreads/condvar.c
View File

@ -26,13 +26,13 @@
#include "restart.h"
static int pthread_cond_timedwait_relative_old(pthread_cond_t *,
pthread_mutex_t *, struct timespec *);
pthread_mutex_t *, const struct timespec *);
static int pthread_cond_timedwait_relative_new(pthread_cond_t *,
pthread_mutex_t *, struct timespec *);
pthread_mutex_t *, const struct timespec *);
static int (*pthread_cond_tw_rel)(pthread_cond_t *, pthread_mutex_t *,
struct timespec *) = pthread_cond_timedwait_relative_old;
const struct timespec *) = pthread_cond_timedwait_relative_old;
/* initialize this module */
void __pthread_init_condvar(int rt_sig_available)
@ -130,29 +130,15 @@ int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
static int
pthread_cond_timedwait_relative_old(pthread_cond_t *cond,
pthread_mutex_t *mutex,
struct timespec * reltime)
const struct timespec * abstime)
{
volatile pthread_descr self = thread_self();
sigset_t unblock, initial_mask;
#ifdef NANOSLEEP_WORKS
int already_canceled = 0;
int was_signalled = 0;
#else
int retsleep;
int already_canceled;
int was_signalled;
#endif
sigjmp_buf jmpbuf;
pthread_extricate_if extr;
#ifndef NANOSLEEP_WORKS
requeue_and_wait_again:
retsleep = 0;
already_canceled = 0;
was_signalled = 0;
#endif
/* Set up extrication interface */
extr.pu_object = cond;
extr.pu_extricate_func = cond_extricate_func;
@ -187,22 +173,30 @@ pthread_cond_timedwait_relative_old(pthread_cond_t *cond,
sigemptyset(&unblock);
sigaddset(&unblock, __pthread_sig_restart);
sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask);
#ifdef NANOSLEEP_WORKS
/* Sleep for the required duration. If woken by a signal, resume waiting
as required by Single Unix Specification. */
while (__libc_nanosleep(reltime, reltime) != 0)
;
#else
/* Sleep for the required duration */
retsleep = __libc_nanosleep(reltime, NULL);
#endif
while (1) {
struct timeval now;
struct timespec reltime;
/* Compute a time offset relative to now. */
__gettimeofday (&now, NULL);
reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000;
reltime.tv_sec = abstime->tv_sec - now.tv_sec;
if (reltime.tv_nsec < 0) {
reltime.tv_nsec += 1000000000;
reltime.tv_sec -= 1;
}
/* Sleep for the required duration. If woken by a signal,
resume waiting as required by Single Unix Specification. */
if (reltime.tv_sec < 0 || __libc_nanosleep(&reltime, NULL) == 0)
break;
}
/* Block the restart signal again */
sigprocmask(SIG_SETMASK, &initial_mask, NULL);
was_signalled = 0;
} else {
#ifndef NANOSLEEP_WORKS
retsleep = -1;
#endif
was_signalled = 1;
}
THREAD_SETMEM(self, p_signal_jmp, NULL);
@ -234,15 +228,7 @@ pthread_cond_timedwait_relative_old(pthread_cond_t *cond,
if (was_on_queue) {
__pthread_set_own_extricate_if(self, 0);
pthread_mutex_lock(mutex);
#ifdef NANOSLEEP_WORKS
return ETIMEDOUT;
#else
if (retsleep == 0)
return ETIMEDOUT;
/* Woken by a signal: resume waiting as required by Single Unix
Specification. */
goto requeue_and_wait_again;
#endif
}
suspend(self);
@ -275,28 +261,14 @@ pthread_cond_timedwait_relative_new(pthread_cond_t *cond,
{
volatile pthread_descr self = thread_self();
sigset_t unblock, initial_mask;
#ifdef NANOSLEEP_WORKS
int already_canceled = 0;
int was_signalled = 0;
#else
int retsleep;
int already_canceled;
int was_signalled;
#endif
sigjmp_buf jmpbuf;
pthread_extricate_if extr;
already_canceled = 0;
was_signalled = 0;
#ifndef NANOSLEEP_WORKS
requeue_and_wait_again:
retsleep = 0;
already_canceled = 0;
was_signalled = 0;
#endif
/* Set up extrication interface */
extr.pu_object = cond;
extr.pu_extricate_func = cond_extricate_func;
@ -330,22 +302,30 @@ pthread_cond_timedwait_relative_new(pthread_cond_t *cond,
sigemptyset(&unblock);
sigaddset(&unblock, __pthread_sig_restart);
sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask);
#ifdef NANOSLEEP_WORKS
/* Sleep for the required duration. If woken by a signal, resume waiting
as required by Single Unix Specification. */
while (__libc_nanosleep(reltime, reltime) != 0)
;
#else
/* Sleep for the required duration */
retsleep = __libc_nanosleep(reltime, NULL);
#endif
while (1) {
struct timeval now;
struct timespec reltime;
/* Compute a time offset relative to now. */
__gettimeofday (&now, NULL);
reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000;
reltime.tv_sec = abstime->tv_sec - now.tv_sec;
if (reltime.tv_nsec < 0) {
reltime.tv_nsec += 1000000000;
reltime.tv_sec -= 1;
}
/* Sleep for the required duration. If woken by a signal,
resume waiting as required by Single Unix Specification. */
if (reltime.tv_sec < 0 || __libc_nanosleep(&reltime, NULL) == 0)
break;
}
/* Block the restart signal again */
sigprocmask(SIG_SETMASK, &initial_mask, NULL);
was_signalled = 0;
} else {
#ifndef NANOSLEEP_WORKS
retsleep = -1;
#endif
was_signalled = 1;
}
THREAD_SETMEM(self, p_signal_jmp, NULL);
@ -374,15 +354,7 @@ pthread_cond_timedwait_relative_new(pthread_cond_t *cond,
if (was_on_queue) {
__pthread_set_own_extricate_if(self, 0);
pthread_mutex_lock(mutex);
#ifdef NANOSLEEP_WORKS
return ETIMEDOUT;
#else
if (retsleep == 0)
return ETIMEDOUT;
/* Woken by a signal: resume waiting as required by Single Unix
Specification. */
goto requeue_and_wait_again;
#endif
}
/* Eat the outstanding restart() from the signaller */
@ -408,22 +380,8 @@ pthread_cond_timedwait_relative_new(pthread_cond_t *cond,
int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
const struct timespec * abstime)
{
struct timeval now;
struct timespec reltime;
/* Compute a time offset relative to now. */
__gettimeofday (&now, NULL);
reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000;
reltime.tv_sec = abstime->tv_sec - now.tv_sec;
if (reltime.tv_nsec < 0) {
reltime.tv_nsec += 1000000000;
reltime.tv_sec -= 1;
}
if (reltime.tv_sec < 0)
return ETIMEDOUT;
/* Indirect call through pointer! */
return pthread_cond_tw_rel(cond, mutex, &reltime);
return pthread_cond_tw_rel(cond, mutex, abstime);
}
int pthread_cond_signal(pthread_cond_t *cond)

4
manual/job.texi
View File

@ -675,8 +675,8 @@ stop together.
The foreground job may have left the terminal in a strange state, so the
shell should restore its own saved terminal modes before continuing. In
case the job is merely been stopped, the shell should first save the
current terminal modes so that it can restore them later if the job is
case the job is merely stopped, the shell should first save the current
terminal modes so that it can restore them later if the job is
continued. The functions for dealing with terminal modes are
@code{tcgetattr} and @code{tcsetattr}; these are described in
@ref{Terminal Modes}.

2
manual/process.texi
View File

@ -63,7 +63,7 @@ possible to create the shell process, and otherwise is the status of the
shell process. @xref{Process Completion}, for details on how this
status code can be interpreted.
If the @var{command} argument is a null pointer a non-zero return value
If the @var{command} argument is a null pointer, a non-zero return value
indicates that a command processor is available and this function can be
used at all.

10
manual/signal.texi
View File

@ -543,7 +543,7 @@ In fact, if @code{SIGKILL} fails to terminate a process, that by itself
constitutes an operating system bug which you should report.
The system will generate @code{SIGKILL} for a process itself under some
unusual conditions where the program cannot possible continue to run
unusual conditions where the program cannot possibly continue to run
(even to run a signal handler).
@end deftypevr
@cindex kill signal
@ -1856,7 +1856,7 @@ blocks signals around each use, then you are safe.
There are a large number of library functions that return values in a
fixed object, always reusing the same object in this fashion, and all of
them cause the same problem. Function descriptions in this manual
them cause the same problem. Function descriptions in this manual
always mention this behavior.
@item
@ -2031,8 +2031,8 @@ atomically.
In practice, you can assume that @code{int} and other integer types no
longer than @code{int} are atomic. You can also assume that pointer
types are atomic; that is very convenient. Both of these assumptions
are true on all of the machines that the GNU C library supports and on
types are atomic; that is very convenient. Both of these assumptions
are true on all of the machines that the GNU C library supports and on
all POSIX systems we know of.
@c ??? This might fail on a 386 that uses 64-bit pointers.
@ -3011,7 +3011,7 @@ to terminate the process or invoke a signal handling function. In other
words, the program is effectively suspended until one of the signals that
is not a member of @var{set} arrives.
If the process is woken up by deliver of a signal that invokes a handler
If the process is woken up by delivery of a signal that invokes a handler
function, and the handler function returns, then @code{sigsuspend} also
returns.