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Re: It doesn't work: using pthread_win32 library installation withMSVC++6
- From: Ross Johnson <rpj at ise dot canberra dot edu dot au>
- To: oliver dot kramer at ferrero dot de
- Cc: pthreads-win32 at sources dot redhat dot com
- Date: Thu, 24 Jan 2002 23:07:58 +1100
- Subject: Re: It doesn't work: using pthread_win32 library installation withMSVC++6
- Organization: University of Canberra, Division of Management and Technology
- References: <41256B4A.00367DAB.00@fer_notes_www.ferrero.de>
- Reply-to: rpj at ise dot canberra dot edu dot au
Hi Oliver,
The problem is that pthreads-win32 doesn't provide POSIX signals,
only those parts of the POSIX standard that relate closely to threads
(excepting those which can't be implementated on Win32 - yet).
If you need Signals then you should look at the CygWin project, which
aims to provide a much more complete Unix/POSIX API on Win32. I'm not
sure how complete the threads support is, but they have been doing a
lot of work on it over the last 12 months.
http://sources.redhat.com/cygwin
http://cygwin.com/licensing.html
Another possibility is the UWin project from AT&T.
http://www.research.att.com/sw/tools/uwin/
Hope this helps.
Ross
oliver.kramer@ferrero.de wrote:
>
> I read all the readable files. I followed all the instructions given in any
> files. Even I recompile the sources but all i get is:
>
> c:\programme\microsoft visual studio\vc98\include\rpcasync.h(45) : warning
> C4115: '_RPC_ASYNC_STATE' : Benannte Typdefinition in runden Klammern
> d:\threads\examples\signals\stat_sigwait.c(33) : error C2065: 'sigset_t' :
> nichtdeklarierter Bezeichner
> d:\threads\examples\signals\stat_sigwait.c(33) : error C2146: Syntaxfehler :
> Fehlendes ';' vor Bezeichner 'sigs_to_catch'
> d:\threads\examples\signals\stat_sigwait.c(33) : error C2065: 'sigs_to_catch' :
> nichtdeklarierter Bezeichner
> d:\threads\examples\signals\stat_sigwait.c(47) : warning C4013: 'sigemptyset'
> undefiniert; Annahme: extern mit Rueckgabetyp int
> d:\threads\examples\signals\stat_sigwait.c(48) : warning C4013: 'sigaddset'
> undefiniert; Annahme: extern mit Rueckgabetyp int
> d:\threads\examples\signals\stat_sigwait.c(48) : error C2065: 'SIGUSR1' :
> nichtdeklarierter Bezeichner
> d:\threads\examples\signals\stat_sigwait.c(51) : warning C4013: 'sigwait'
> undefiniert; Annahme: extern mit Rueckgabetyp int
> d:\threads\examples\signals\stat_sigwait.c(77) : warning C4013: 'sleep'
> undefiniert; Annahme: extern mit Rueckgabetyp int
> d:\threads\examples\signals\stat_sigwait.c(97) : error C2146: Syntaxfehler :
> Fehlendes ';' vor Bezeichner 'sigs_to_block'
> d:\threads\examples\signals\stat_sigwait.c(97) : error C2065: 'sigs_to_block' :
> nichtdeklarierter Bezeichner
> d:\threads\examples\signals\stat_sigwait.c(98) : error C2143: Syntaxfehler :
> Fehlendes ';' vor 'type'
> d:\threads\examples\signals\stat_sigwait.c(110) : warning C4013:
> 'pthread_sigmask' undefiniert; Annahme: extern mit Rueckgabetyp int
> Fehler beim Ausführen von cl.exe.
>
> SIGNAL.exe - 7 Fehler, 6 Warnung(en)
>
> After reading all the relevant postings in the whole usenet .... - please help!
> What's going wrong? Urgent!
>
> Oliver
>
> I tried to compile an example from "Pthread programming" (O'Reilly) =>
> stat_sig_wait.c:
>
> /********************************************************
> * An example source module to accompany...
> *
> * "Using POSIX Threads: Programming with Pthreads"
> * by Brad nichols, Dick Buttlar, Jackie Farrell
> * O'Reilly & Associates, Inc.
> *
> ********************************************************
> * stat_sigwait.c
> *
> * Simple example of pthreads and signals.
> */
>
> #include <stdlib.h>
> #include <stdio.h>
> // #include <unistd.h>
> #include <io.h>
>
> #include <signal.h>
> #include <time.h>
> #include <sys/types.h>
>
> #include <pthread.h>
>
> #define MAX_NUM_THREADS 10
>
> pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
> int mean, samples, total;
>
> void *report_stats(void *p)
> {
> int caught;
> sigset_t sigs_to_catch;
>
> /* Identify our thread */
> printf("\nreport_stats() started.\n");
>
> /*
> * We inherited a thread sigmask with all the signals
> * blocked. So, we can wait on whatever signals we're
> * interested in and (as long as no other thread waits
> * for them) we'll be sure return from sigwait() to
> * handle it.
> */
>
> /* set this thread's signal mask to block out SIGUSR1 */
> sigemptyset(&sigs_to_catch);
> sigaddset(&sigs_to_catch, SIGUSR1);
>
> for (;;) {
> sigwait(&sigs_to_catch, &caught);
>
> pthread_mutex_lock(&stats_lock);
> mean = total/samples;
> printf("\nreport_stats(): mean = %d, samples = %d\n", mean, samples);
> pthread_mutex_unlock(&stats_lock);
> }
> return NULL;
> }
> /*
> * worker_thread --
> *
> * Don't read too much into what this thread does. It's
> * a very simpleminded example. The only interesting thing
> * it does is write to the global statistics data-- which
> * means the thread processing the signal has to protect
> * against simultaneous access.
> */
> void *worker_thread(void *p)
> {
> int item;
> time_t now;
> int *amtp=(int *)p;
>
> for (;;) {
>
> sleep((*amtp)*9);
>
> now = time(NULL);
>
> pthread_mutex_lock(&stats_lock);
> total+=((int)now)%60; /* probably not the safest thing to do but
> it's just an example */
> samples++;
> pthread_mutex_unlock(&stats_lock);
> }
> /* Won't get here. */
> return NULL;
> }
>
> extern int
> main(void)
> {
> int i;
> pthread_t threads[MAX_NUM_THREADS];
> int num_threads = 0;
> sigset_t sigs_to_block;
> struct sigaction action;
>
> /* Identify our thread */
> printf("main() running in thread 0x%x\n", pthread_self());
>
> /*
> * Set this thread's signal mask to block SIGUSR1
> * Other thread's will inherit the mask
> */
> sigemptyset(&sigs_to_block);
> sigaddset(&sigs_to_block, SIGUSR1);
> pthread_sigmask(SIG_BLOCK, &sigs_to_block, NULL);
>
> /* spawn statistics reporting thread */
> pthread_create(&threads[num_threads++],
> NULL,
> report_stats,
> NULL);
>
> /* spawn the threads */
> for (i=num_threads; i<MAX_NUM_THREADS; i++) {
> pthread_create(&threads[num_threads++],
> NULL,
> worker_thread,
> &i);
> }
>
> printf("main()\t\t\t\t%d threads created\n",num_threads);
>
> /* wait until all threads have finished */
> for (i = 0; i < num_threads; i++) {
> pthread_join(threads[i], NULL);
> printf("main()\t\tjoined to thread %d \n", i);
> }
>
> printf("main()\t\tall %d threads have finished. \n", num_threads);
>
> return 0;
> }