| /* |
| * Copyright (c) 2004, Bull S.A.. All rights reserved. |
| * Created by: Sebastien Decugis |
| |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| |
| * This sample test aims to check the following assertion: |
| * The function does not return an error code of EINTR |
| |
| * The steps are: |
| * |
| * -> Create a thread which wait in a condition. |
| * -> Create a second thread which signals this condition. |
| * -> Another thread which loops on sending a signal to the second thread. |
| * |
| */ |
| |
| /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */ |
| #define _POSIX_C_SOURCE 200112L |
| |
| /********************************************************************************************/ |
| /****************************** standard includes *****************************************/ |
| /********************************************************************************************/ |
| #include <pthread.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| #include <semaphore.h> |
| #include <errno.h> |
| #include <signal.h> |
| #include <time.h> |
| |
| /********************************************************************************************/ |
| /****************************** Test framework *****************************************/ |
| /********************************************************************************************/ |
| #include "../testfrmw/testfrmw.h" |
| #include "../testfrmw/testfrmw.c" |
| /* This header is responsible for defining the following macros: |
| * UNRESOLVED(ret, descr); |
| * where descr is a description of the error and ret is an int (error code for example) |
| * FAILED(descr); |
| * where descr is a short text saying why the test has failed. |
| * PASSED(); |
| * No parameter. |
| * |
| * Both three macros shall terminate the calling process. |
| * The testcase shall not terminate in any other maneer. |
| * |
| * The other file defines the functions |
| * void output_init() |
| * void output(char * string, ...) |
| * |
| * Those may be used to output information. |
| */ |
| |
| /********************************************************************************************/ |
| /********************************** Configuration ******************************************/ |
| /********************************************************************************************/ |
| #define WITH_SYNCHRO |
| #ifndef VERBOSE |
| #define VERBOSE 2 |
| #endif |
| |
| /********************************************************************************************/ |
| /*********************************** Test case *****************************************/ |
| /********************************************************************************************/ |
| |
| char do_it=1; |
| char woken=0; |
| unsigned long count_cnd_sig=0, count_cnd_wup=0; |
| #ifdef WITH_SYNCHRO |
| sem_t semsig1; |
| sem_t semsig2; |
| unsigned long count_sig=0; |
| #endif |
| |
| sigset_t usersigs; |
| |
| typedef struct |
| { |
| int sig; |
| #ifdef WITH_SYNCHRO |
| sem_t *sem; |
| #endif |
| } thestruct; |
| |
| struct |
| { |
| pthread_mutex_t mtx; |
| pthread_cond_t cnd; |
| } data; |
| |
| /* the following function keeps on sending the signal to the process */ |
| void * sendsig (void * arg) |
| { |
| thestruct *thearg = (thestruct *) arg; |
| int ret; |
| pid_t process; |
| |
| process=getpid(); |
| |
| /* We block the signals SIGUSR1 and SIGUSR2 for this THREAD */ |
| ret = pthread_sigmask(SIG_BLOCK, &usersigs, NULL); |
| if (ret != 0) { UNRESOLVED(ret, "Unable to block SIGUSR1 and SIGUSR2 in signal thread"); } |
| |
| while (do_it) |
| { |
| #ifdef WITH_SYNCHRO |
| if ((ret = sem_wait(thearg->sem))) |
| { UNRESOLVED(errno, "Sem_wait in sendsig"); } |
| count_sig++; |
| #endif |
| |
| ret = kill(process, thearg->sig); |
| if (ret != 0) { UNRESOLVED(errno, "Kill in sendsig"); } |
| |
| } |
| |
| return NULL; |
| } |
| |
| /* Next are the signal handlers. */ |
| /* This one is registered for signal SIGUSR1 */ |
| void sighdl1(int sig) |
| { |
| #ifdef WITH_SYNCHRO |
| if (sem_post(&semsig1)) |
| { UNRESOLVED(errno, "Sem_post in signal handler 1"); } |
| #endif |
| } |
| /* This one is registered for signal SIGUSR2 */ |
| void sighdl2(int sig) |
| { |
| #ifdef WITH_SYNCHRO |
| if (sem_post(&semsig2)) |
| { UNRESOLVED(errno, "Sem_post in signal handler 2"); } |
| #endif |
| } |
| |
| /* The following function will wait on the cond |
| * it does check that no error code of EINTR is returned */ |
| void * waiter(void * arg) |
| { |
| int ret; |
| |
| /* We block the signals SIGUSR1 and SIGUSR2 for this THREAD */ |
| ret = pthread_sigmask(SIG_BLOCK, &usersigs, NULL); |
| if (ret != 0) { UNRESOLVED(ret, "Unable to block SIGUSR1 and SIGUSR2 in signal thread"); } |
| |
| ret = pthread_mutex_lock(&(data.mtx)); |
| if (ret != 0) { UNRESOLVED(ret, "Unable to lock mutex in waiter thread"); } |
| |
| do |
| { |
| ret = pthread_cond_wait(&(data.cnd),&(data.mtx)); |
| count_cnd_wup++; |
| } while ((ret == 0) && (do_it != 0)); |
| if (ret != 0) |
| { |
| UNRESOLVED(ret, "pthread_cond_wait returned an unexpected error"); |
| } |
| |
| woken++; |
| |
| ret = pthread_mutex_unlock(&(data.mtx)); |
| if (ret != 0) { UNRESOLVED(ret, "Unable to unlock mutex in waiter thread"); } |
| |
| return NULL; |
| } |
| |
| /* The next function will signal the condition */ |
| void * worker (void * arg) |
| { |
| int ret=0; |
| |
| /* We don't block the signals SIGUSR1 and SIGUSR2 for this THREAD */ |
| ret = pthread_sigmask(SIG_UNBLOCK, &usersigs, NULL); |
| if (ret != 0) { UNRESOLVED(ret, "Unable to unblock SIGUSR1 and SIGUSR2 in worker thread"); } |
| |
| while (woken==0) |
| { |
| ret = pthread_cond_signal(&(data.cnd)); |
| if (ret == EINTR) { FAILED("pthread_cond_signal returned EINTR"); } |
| if (ret != 0) { UNRESOLVED(ret, "Failed to signal the condition"); } |
| count_cnd_sig++; |
| } |
| |
| return NULL; |
| } |
| |
| /* Main function */ |
| int main (int argc, char * argv[]) |
| { |
| int ret; |
| pthread_t th_waiter, th_worker, th_sig1, th_sig2; |
| thestruct arg1, arg2; |
| struct sigaction sa; |
| |
| output_init(); |
| |
| /* We need to register the signal handlers for the PROCESS */ |
| sigemptyset (&sa.sa_mask); |
| sa.sa_flags = 0; |
| sa.sa_handler = sighdl1; |
| if ((ret = sigaction (SIGUSR1, &sa, NULL))) |
| { UNRESOLVED(ret, "Unable to register signal handler1"); } |
| sa.sa_handler = sighdl2; |
| if ((ret = sigaction (SIGUSR2, &sa, NULL))) |
| { UNRESOLVED(ret, "Unable to register signal handler2"); } |
| |
| /* We prepare a signal set which includes SIGUSR1 and SIGUSR2 */ |
| sigemptyset(&usersigs); |
| ret = sigaddset(&usersigs, SIGUSR1); |
| ret |= sigaddset(&usersigs, SIGUSR2); |
| if (ret != 0) { UNRESOLVED(ret, "Unable to add SIGUSR1 or 2 to a signal set"); } |
| |
| /* We now block the signals SIGUSR1 and SIGUSR2 for this THREAD */ |
| ret = pthread_sigmask(SIG_BLOCK, &usersigs, NULL); |
| if (ret != 0) { UNRESOLVED(ret, "Unable to block SIGUSR1 and SIGUSR2 in main thread"); } |
| |
| #ifdef WITH_SYNCHRO |
| if (sem_init(&semsig1, 0, 1)) |
| { UNRESOLVED(errno, "Semsig1 init"); } |
| if (sem_init(&semsig2, 0, 1)) |
| { UNRESOLVED(errno, "Semsig2 init"); } |
| #endif |
| |
| if ((ret = pthread_create(&th_waiter, NULL, waiter, NULL))) |
| { UNRESOLVED(ret, "Waiter thread creation failed"); } |
| |
| if ((ret = pthread_create(&th_worker, NULL, worker, NULL))) |
| { UNRESOLVED(ret, "Worker thread creation failed"); } |
| |
| arg1.sig = SIGUSR1; |
| arg2.sig = SIGUSR2; |
| #ifdef WITH_SYNCHRO |
| arg1.sem = &semsig1; |
| arg2.sem = &semsig2; |
| #endif |
| |
| if ((ret = pthread_create(&th_sig1, NULL, sendsig, (void *)&arg1))) |
| { UNRESOLVED(ret, "Signal 1 sender thread creation failed"); } |
| if ((ret = pthread_create(&th_sig2, NULL, sendsig, (void *)&arg2))) |
| { UNRESOLVED(ret, "Signal 2 sender thread creation failed"); } |
| |
| /* Let's wait for a while now */ |
| sleep(1); |
| |
| /* Now stop the threads and join them */ |
| do { do_it=0; } |
| while (do_it); |
| |
| if ((ret = pthread_join(th_sig1, NULL))) |
| { UNRESOLVED(ret, "Signal 1 sender thread join failed"); } |
| if ((ret = pthread_join(th_sig2, NULL))) |
| { UNRESOLVED(ret, "Signal 2 sender thread join failed"); } |
| if ((ret = pthread_join(th_waiter, NULL))) |
| { UNRESOLVED(ret, "Waiter thread join failed"); } |
| if ((ret = pthread_join(th_worker, NULL))) |
| { UNRESOLVED(ret, "Worker thread join failed"); } |
| |
| #if VERBOSE > 0 |
| output("Test executed successfully.\n"); |
| output(" Condition was signaled %d times.\n", count_cnd_sig); |
| output(" pthread_cond_wait exited %d times.\n", count_cnd_wup); |
| #ifdef WITH_SYNCHRO |
| output(" %d signals were sent meanwhile.\n", count_sig); |
| #endif |
| #endif |
| PASSED; |
| } |