anytimer

anytimer.c #include <stdlib.h> #include <stdio.h> #include <sys/types.h> #include <unistd.h> #include <signal.h> #include <sys/time.h> #include <errno.h> #include <wait.h> #include "anytimer.h" struct timer *job[MAXS]; static int inited = 0; static struct sigaction older; static struct itimerval olditv; struct timer { int pos; void *data; any anyfunc; }; int anytimer_print(void) { int i; for( i = 0; i < MAXS; i++) { if(job[i] != NULL && job[i]->pos == 0) { kill(getpid(), SIGRTMIN); return i; } } return -1; } void int_handler() { int i, j; int ret; pid_t pid; for(i = 0; i < MAXS; i++) { if(job[i] != NULL) job[i]->pos -= 1; } pid = fork(); if(pid == 0) { ret = anytimer_print(); if(ret != -1) job[ret]->anyfunc(job[ret]->data); else { sigprocmask(SIG_SETMASK, &olders, NULL); } exit(0); } ret = anytimer_print(); write(1,"*",1); wait(NULL); } static void moduler_unload(void) { sigaction(SIGALRM, &older, NULL); setitimer(ITIMER_REAL, &olditv, NULL); } void moduler_load() { struct sigaction act; struct itimerval itv; act.sa_handler = int_handler; sigemptyset(&act.sa_mask); act.sa_flags = 0; sigaction(SIGALRM, &act, &older); itv.it_interval.tv_sec = 1; itv.it_interval.tv_usec = 0; itv.it_value.tv_sec = 1; itv.it_value.tv_usec = 0; setitimer(ITIMER_REAL, &itv, &olditv); atexit(moduler_unload);//钩子函数 } int find_arr() // 寻找空数组下标 { int i; for(i = 0; i < MAXS; i++) { if(job[i] == NULL) return i; } return -1; } void anytimer_alarm(int n,any anytime, void *p) { struct timer *me = NULL; int ret; int i; if(inited == 0) { moduler_load(); inited = 1; } me = malloc(sizeof(struct timer)); if(me == NULL) { fprintf(stderr,"malloc is faild !\n"); exit(-1); } me->pos = n; me->data = p; me->anyfunc = anytime; ret = find_arr(); // 寻找空数组下标 if(ret == -1) { fprintf(stderr, "find arr is faild!\n"); free(me); exit(-1); } job[ret] = me; } void anytimer_destroy(void) { int i; for(i = 0; i < MAXS; i++) { if(job[i] != NULL) free(job[i]); job[i] = NULL; } } anytimer.h #ifndef __ANYTIMER_H #define __ANYTIMER_H #define MAXS 1024 typedef void( *any)(void*); void anytimer_alarm(int n,any anytime, void *p); void anytimer_destroy(void); #endif main.c #include <stdio.h> #include <stdlib.h> #include <wait.h> #include <sys/types.h> #include <unistd.h> #include "anytimer.h" static void any1(void *s) { printf("%s", (char *)s); fflush(NULL); } static void any2(void *s) { printf("%s", (char *)s); fflush(NULL); } static void any3(void *s) { printf("%s", (char *)s); fflush(NULL); } int main(void) { anytimer_alarm(3, any1, "hello"); anytimer_alarm(2, any2, "world"); anytimer_alarm(5, any3, "apue"); while (1) { } anytimer_destroy(); return 0; } ~

 

转载于:https://www.cnblogs.com/APUEsocket/p/10585145.html

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