Linux下多线程实例
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mydef.h
#include <semaphore.h>#include <errno.h>#ifdef Solaris#include <thread.h>#include <synch.h>#endif#ifdef Linux#include <pthread.h>#endif#define MY_ERROR(thread,func) \{\ printf("Error in thread\"%s\",func=\"%s\",errno=%d\n",thread,func,errno);\}#define MY_ERROR2(thread,func,rt) \{\ printf("Error in thread\"%s\",func=\"%s\",return=%d,errno=%d\n",thread,func,rt,errno);\}typedef struct param_tag{#ifdef Linux sem_t *sema1_p; sem_t *sema2_p;#else sema_t *sema1_p; sema_t *sema2_p;#endif}param_t;extern void * t1(void * p);extern void * t2(void * p);extern void * t3(void * p);extern void * t4(void * p);extern void * t5(void * p);extern void * myhandle(int sig);#ifdef Linuxextern sem_t sema1;extern sem_t sema2;#elseextern sema_t sema1;extern sema_t sema2;#endifmytest.c
/** main thread * * init semaphore * start thread 1 * start thread 2 * start thread 3 * **/#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <string.h>#include <signal.h>#include "mydef.h"#ifdef Linux sem_t sema1; sem_t sema2;#else sema_t sema1; sema_t sema2;#endif/** test deadlock * * init semaphore * start thread 1 * start thread 2 * start thread 3 * **/int test_dlock(){#ifdef Linux pthread_t threadid;#else thread_t threadid;#endif param_t param; int rc;#ifdef Linux rc = sem_init(&sema1,0,1); rc = sem_init(&sema2,0,1);#else rc = sema_init(&sema1,1,USYNC_THREAD,NULL); rc = sema_init(&sema2,1,USYNC_THREAD,NULL);#endif if( rc != 0 ) { MY_ERROR("main","sem_init") return 0; } param.sema1_p = &sema1; param.sema2_p = &sema2; #ifdef Linux rc = pthread_create( &threadid, NULL, t1, (void *)¶m); if( rc != 0 ) { MY_ERROR("t1","pthread_create") return 0; } rc = pthread_create( &threadid, NULL, t2, (void *)¶m); rc = pthread_create( &threadid, NULL, t3, (void *)¶m);#else rc = thr_create(NULL,0,t1, (void *)¶m,THR_BOUND,&threadid); if( rc != 0 ) { MY_ERROR("t1","thr_create") return 0; } rc = thr_create(NULL,0,t2, (void *)¶m,THR_BOUND,&threadid); rc = thr_create(NULL,0,t3, (void *)¶m,THR_BOUND,&threadid);#endif sleep(5);}/** test EINTR * * init semaphore * start thread 4 * start thread 5 * **/int test_intr(){#ifdef Linux pthread_t threadid;#else thread_t threadid;#endif param_t param; int rc;#ifdef Linux rc = sem_init(&sema1,0,1); rc = sem_init(&sema2,0,1);#else rc = sema_init(&sema1,1,USYNC_THREAD,NULL); rc = sema_init(&sema2,1,USYNC_THREAD,NULL);#endif if( rc != 0 ) { MY_ERROR("main","sem_init") return 0; } signal(SIGSYS,myhandle); param.sema1_p = &sema1; param.sema2_p = &sema2;#ifdef Linux rc = pthread_create( &threadid, NULL, t4, (void *)¶m); if( rc != 0 ) { MY_ERROR("t4","pthread_create") return 0; } rc = pthread_create( &threadid, NULL, t5, (void *)¶m);#else rc = thr_create(NULL,0,t4, (void *)¶m,THR_BOUND,&threadid); if( rc != 0 ) { MY_ERROR("t4","thr_create") return 0; } rc = thr_create(NULL,0,t5, (void *)¶m,THR_BOUND,&threadid);#endif sleep(100); return 0;}/** test EINTR single thread * * init semaphore * t4() * **/int test_intr_single(){ param_t param; int rc;#ifdef Linux rc = sem_init(&sema1,0,1);#else rc = sema_init(&sema1,1,USYNC_THREAD,NULL);#endif if( rc != 0 ) { MY_ERROR("main","sem_init") return 0; } param.sema1_p = &sema1; param.sema2_p = NULL; t4(¶m); return 0;}int main(){ test_intr_single();}t1.c
/** thread 1 * * sem_wait(lock1) * sleep(1) * sem_wait(lock2) * deadLock with t2 !!! * * **/ #include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <string.h>#include "mydef.h"extern void * t1(void * p){#ifdef Linux sem_t *sema1_p; sem_t *sema2_p;#else sema_t *sema1_p; sema_t *sema2_p;#endif param_t *param_p = p; int rc; int val; sema1_p = param_p->sema1_p; sema2_p = param_p->sema2_p; #ifdef Linux rc = sem_wait(sema1_p);#else rc = sema_wait(sema1_p);#endif if( rc != 0 ) { MY_ERROR("t1","sema_wait(sema1)") return 0; } printf("thread \"t1\" get \"sema1\" OK.\n");#ifdef Linux rc = sem_getvalue(sema1_p, &val); printf("thread \"t1\" value of \"sema1\" is %d.\n", val);#endif sleep(1);#ifdef Linux rc = sem_getvalue(sema2_p, &val); printf("thread \"t1\" value of \"sema2\" is %d.\n", val);#endif printf("thread \"t1\" waiting for \"sema2\" ...\n");#ifdef Linux rc = sem_wait(sema2_p);#else rc = sema_wait(sema2_p);#endif if( rc != 0 ) { MY_ERROR("t1","sema_wait(sema2)") return 0; } printf("thread \"t1\" get \"sema2\" OK.\n"); return 0;}t2.c
/** thread 2 * * sem_wait(lock2) * sleep(1) * sem_wait(lock1) * deadLock with t1 !!! * * **/#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <string.h>#include "mydef.h"extern void * t2(void * p){#ifdef Linux sem_t *sema1_p; sem_t *sema2_p;#else sema_t *sema1_p; sema_t *sema2_p;#endif param_t *param_p = p; int rc; int val; sema1_p = param_p->sema1_p; sema2_p = param_p->sema2_p; #ifdef Linux rc = sem_wait(sema2_p);#else rc = sema_wait(sema2_p);#endif if( rc != 0 ) { MY_ERROR("t2","sema_wait(sema2)") return 0; } printf("thread \"t2\" get \"sema2\" OK.\n");#ifdef Linux rc = sem_getvalue(sema2_p, &val); printf("thread \"t2\" value of \"sema2\" is %d.\n", val);#endif sleep(1);#ifdef Linux rc = sem_getvalue(sema1_p, &val); printf("thread \"t2\" value of \"sema1\" is %d.\n", val);#endif printf("thread \"t2\" waiting for \"sema1\" ...\n");#ifdef Linux rc = sem_wait(sema1_p);#else rc = sema_wait(sema1_p);#endif if( rc != 0 ) { MY_ERROR("t2","sema_wait(sema1)") return 0; } printf("thread \"t2\" get \"sema1\" OK.\n"); return 0;}t3.c
/** thread 3 * * sleep(3) * sem_trywait(lock1) * deteck deadLock between t1 and t2 * **/#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <string.h>#include "mydef.h"extern void * t3(void * p){#ifdef Linux sem_t *sema1_p; sem_t *sema2_p;#else sema_t *sema1_p; sema_t *sema2_p;#endif param_t *param_p = p; int rc; int val; sema1_p = param_p->sema1_p; sema2_p = param_p->sema2_p; sleep(3); errno = -1;#ifdef Linux rc = sem_trywait(sema1_p); if( rc == -1 ) { switch(errno) { case EBUSY: printf("thread \"t3\" can't get \"sema1\" : EBUSY.\n"); break; case EAGAIN: printf("thread \"t3\" can't get \"sema1\" : EAGAIN.\n"); break; case EDEADLK: printf("thread \"t3\" can't get \"sema1\" : EDEADLK.\n"); break; case EINTR: printf("thread \"t3\" can't get \"sema1\" : EINTR.\n"); break; default: MY_ERROR2("t3","sema_trywait(sema1)",rc) } return 0; } if( rc != 0 ) {// for solaris librt.so switch(rc) { case EBUSY: printf("thread \"t3\" can't get \"sema1\" : EBUSY.\n"); break; case EAGAIN: printf("thread \"t3\" can't get \"sema1\" : EAGAIN.\n"); break; case EDEADLK: printf("thread \"t3\" can't get \"sema1\" : EDEADLK.\n"); break; case EINTR: printf("thread \"t3\" can't get \"sema1\" : EINTR.\n"); break; default: MY_ERROR2("t3","sema_trywait(sema1)",rc) } return 0; }#else rc = sema_trywait(sema1_p); if( rc != 0 ) { switch(rc) { case EBUSY: printf("thread \"t3\" can't get \"sema1\" : EBUSY.\n"); break; case EAGAIN: printf("thread \"t3\" can't get \"sema1\" : EAGAIN.\n"); break; case EDEADLK: printf("thread \"t3\" can't get \"sema1\" : EDEADLK.\n"); break; case EINTR: printf("thread \"t3\" can't get \"sema1\" : EINTR.\n"); break; default: MY_ERROR("t3","sema_trywait(sema1)") } return 0; }#endif printf("thread \"t3\" get \"sema1\" OK.\n"); return 0;}t4.c
/** thread 4 * * loop: usleep(100000);sem_trywait(sema1);sem_post(sema1); * deteck EINTR in sem_trywait() * **/#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <string.h>#include "mydef.h"extern void * t4(void * p){#ifdef Linux sem_t *sema1_p; sem_t *sema2_p;#else sema_t *sema1_p; sema_t *sema2_p;#endif param_t *param_p = p; int rc; int val; sema1_p = param_p->sema1_p; sema2_p = param_p->sema2_p; while(1) { usleep(100000); errno = -1;#ifdef Linux //rc = sem_getvalue(sema1_p, &val); //printf("thread \"t4\" value of \"sema1\" is %d.\n", val); rc = sem_trywait(sema1_p); //rc = sem_wait(sema1_p); if( rc == -1 ) { switch(errno) { case EBUSY: printf("thread \"t4\" can't get \"sema1\" : EBUSY.\n"); break; case EAGAIN: printf("thread \"t4\" can't get \"sema1\" : EAGAIN.\n"); break; case EDEADLK: printf("thread \"t4\" can't get \"sema1\" : EDEADLK.\n"); break; case EINTR: printf("thread \"t4\" can't get \"sema1\" : EINTR.\n"); break; default: MY_ERROR2("t4","sema_trywait(sema1)",rc) } }#else rc = sema_trywait(sema1_p); if( rc != 0 ) { switch(rc) { case EBUSY: printf("thread \"t4\" can't get \"sema1\" : EBUSY.\n"); break; case EAGAIN: printf("thread \"t4\" can't get \"sema1\" : EAGAIN.\n"); break; case EDEADLK: printf("thread \"t4\" can't get \"sema1\" : EDEADLK.\n"); break; case EINTR: printf("thread \"t4\" can't get \"sema1\" : EINTR.\n"); break; default: MY_ERROR("t4","sema_trywait(sema1)") } }#endif#ifdef Linux rc = sem_post(sema1_p); if( rc == -1 ) { switch(errno) { case EBUSY: printf("thread \"t4\" can't post \"sema1\" : EBUSY.\n"); break; case EAGAIN: printf("thread \"t4\" can't post \"sema1\" : EAGAIN.\n"); break; case EDEADLK: printf("thread \"t4\" can't post \"sema1\" : EDEADLK.\n"); break; case EINTR: printf("thread \"t4\" can't post \"sema1\" : EINTR.\n"); break; default: MY_ERROR2("t4","sem_post(sema1)",rc) } }#else rc = sema_post(sema1_p); if( rc != 0 ) { switch(rc) { case EBUSY: printf("thread \"t4\" can't post \"sema1\" : EBUSY.\n"); break; case EAGAIN: printf("thread \"t4\" can't post \"sema1\" : EAGAIN.\n"); break; case EDEADLK: printf("thread \"t4\" can't post \"sema1\" : EDEADLK.\n"); break; case EINTR: printf("thread \"t4\" can't post \"sema1\" : EINTR.\n"); break; default: MY_ERROR("t4","sema_post(sema1)") } }#endif } return 0;}t5.c
/** thread 5 * * loop: usleep(50000);raise(signum); * * try EINTR in sem_trywait() * **/#include <stdio.h>#include <stdlib.h>#include <sys/types.h>#include <string.h>#include <signal.h>#include "mydef.h"extern void * t5(void * p){ while(1) { usleep(50000); raise(SIGSYS); } return 0;}extern void * myhandle(int sig){ return 0;}cmp_linux.sh
#!/bin/shcc -c -DLinux t1.ccc -c -DLinux t2.ccc -c -DLinux t3.ccc -c -DLinux t4.ccc -c -DLinux t5.ccc -c -DLinux mytest.ccc -o mytest t1.o t2.o t3.o t4.o t5.o mytest.o -lpthread
cmp_sol.sh
#!/bin/shcc -c -DSolaris t1.ccc -c -DSolaris t2.ccc -c -DSolaris t3.ccc -c -DSolaris t4.ccc -c -DSolaris t5.ccc -c -DSolaris mytest.ccc -o mytest t1.o t2.o t3.o t4.o t5.o mytest.o -lpthread
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