looking in pthread's source code I can see that as an epilogue both pthread_cond_timedwait and pthread_cond_wait will try to relock the mutex by means of __pthread_mutex_cond_lock.
Whose pthread source code? There are lots of pthread implementations out there.
Quote:
Does this mean that any of them both could eventually block forever if the mutex is never again available after waiting for the conditional variable signal?
You should acquire the mutex before calling phtread_cond_wait
Hi all, my RS/6k 7043 150 with aix 4.3.3 takes FOREVER to log in. When I power the machine on, the boot process procedes normally and I get 2 short beeps (which I don't recall hearing before) and then I get the login window. If I log in, as root, say, the machine goes to its usual blue screen... (3 Replies)
When I am using msgrcv to get a message from a queue, in case of msgsnd some error, the msgrcv thread will waiting forever.
Is there some way that I can specify a time out value for this queue ? just let msgrcv wait for some time, if no message comes during this time slot, msgrcv just return... (3 Replies)
Hi I am very new for Solaris, I want to make some users' passwords never expired. My ssytem kernel is: 5.8
# uname -a
SunOS sspfs_svr 5.8 Generic_117000-01 sun4u sparc SUNW,Netra-240
Could you make some advice?
Thanks (5 Replies)
Hi guys! I've just mounted my drive in fstab:
/dev/sdb /myfolder ext3 defaults 0 0
and rebooted linux.
I've got severel failers during booting process and also I can't login as root first time:
login: root
password:root
incorrect login
login:user
password: user
... (1 Reply)
Just looking at my ethernet interface.. I see this response... what does this mean...?
ipconfig...
lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft... (0 Replies)
I need to use pthread_cond_timedwait, which is available in my old embedded Linux for PPC. But I don't have clock_gettime... So, I build this replacement for clock_gettime, and it seems to work:
#include <sys/time.h>
#include <time.h>
int clock_gettime_replacement(struct timespec *now) {... (1 Reply)
I'm trying to make a little script, but I have a problem...
I'm trying to sed a list of files made with a ls > filename.txt...
Two variables (or i may call them constant because they are fixed values :D):
ststr1 and ststr2
I want to
sed s/"$ststr1"/"$ststr2"/g filename.txt >... (5 Replies)
Hello All,
I was trying to install one rpm and it failed due to missing dependencies, when I try to look at the dependencies and try to install them it is asking for 100+ dependencies, did any one ever face this problem? how can we fix this?
rpm -ivh /var/tmp/erlang-R15B-02.1.el6.x86_64.rpm... (0 Replies)
I am trying to use the forever command. I can get it to work if I do not use the w option to watch for changes and cause an automatic restart on a change to the contents of the directory being watched.
I would really like to use the watch option. Is this option fully implemented? here is an... (4 Replies)
Discussion started by: barrygordon
4 Replies
LEARN ABOUT FREEBSD
pthread_cond_wait
PTHREAD_COND_WAIT(3) BSD Library Functions Manual PTHREAD_COND_WAIT(3)NAME
pthread_cond_wait -- wait on a condition variable
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h>
int
pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex);
DESCRIPTION
The pthread_cond_wait() function atomically blocks the current thread waiting on the condition variable specified by cond, and releases the
mutex specified by mutex. The waiting thread unblocks only after another thread calls pthread_cond_signal(3), or pthread_cond_broadcast(3)
with the same condition variable, and the current thread reacquires the lock on mutex.
RETURN VALUES
If successful, the pthread_cond_wait() function will return zero. Otherwise an error number will be returned to indicate the error.
ERRORS
The pthread_cond_wait() function will fail if:
[EINVAL] The value specified by cond or the value specified by mutex is invalid.
[EPERM] The specified mutex was not locked by the calling thread.
SEE ALSO pthread_cond_broadcast(3), pthread_cond_destroy(3), pthread_cond_init(3), pthread_cond_signal(3), pthread_cond_timedwait(3)STANDARDS
The pthread_cond_wait() function conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').
BSD February 16, 2006 BSD