anytime

  1 #include<stdio.h>
  2 #include<stdlib.h>
  3 #include<unistd.h>
  4 #include<sys/time.h>
  5 #include<signal.h>
  6 #include<string.h>
  7 
  8 #define BUFMAX  1024
  9 
 10 
 11 static void alarm_handler(int s);
 12 
 13 
 14 static int init_mod;
 15 static struct sigaction oldact;
 16 typedef void (*anytm_t)(void *s);
 17 typedef struct myalarm{
 18     int sec;
 19     anytm_t anytm;
 20     //void (*anytm_t)(void *s);
 21     char * arg;
 22 }tim_t;
 23 static tim_t *buf[BUFMAX] = {};
 24 
 25 
 26 //关闭闹钟
 27 static void buf_break(void)
 28 {
 29     struct itimerval itv;
 30     sigaction(SIGALRM,&oldact,NULL);
 31     itv.it_interval.tv_sec = 0;
 32     itv.it_interval.tv_usec = 0;
 33     itv.it_value.tv_sec = 0;
 34     itv.it_value.tv_usec = 0;
 35     setitimer(ITIMER_REAL,&itv,NULL);
 36     init_mod = 0;
 37 }
 38 
 39 
 40 static void func(void *s)
 41 {
 42     printf("%s",(char *)s);
 43     fflush(NULL);
 44 
 45 }
 46 
 47 static void alarm_init(void)
 48 {
 49     struct itimerval itv;
 50     itv.it_interval.tv_sec = 1;
 51     itv.it_interval.tv_usec = 0;
 52     itv.it_value.tv_sec = 1;
 53     itv.it_value.tv_usec = 0;
 54 
 55     struct sigaction act;
 56     act.sa_handler = alarm_handler;
 57     sigemptyset(&act.sa_mask);
 58     act.sa_flags = 0;
 59 
 60     setitimer(ITIMER_REAL,&itv,NULL);
 61     sigaction(SIGALRM,&act,&oldact);
 62     init_mod = 1;
 63 
 64 
 65 }
 66 static void alarm_handler(int s)
 67 {
 68     for(int i = 0;i < 1024;i++)
 69     {
 70         if(buf[i] != NULL)
 71         {
 72             buf[i]->sec--;
 73             if(buf[i]->sec == 0)
 74             {
 75                 buf[i]->anytm(buf[i]->arg);
 76                 free(buf[i]);
 77                 buf[i] = NULL;
 78             }
 79         }
 80     }
 81 }
 82 
 83 
 84 
 85 static int time_init(int n,anytm_t anytm,void *p)
 86 {
 87     tim_t *t = NULL;
 88     int i;
 89     if(0==init_mod)
 90         alarm_init();
 91     t = malloc(sizeof(tim_t) + strlen(p));
 92     if(t == NULL)
 93         return -1;
 94 
 95     for(int i = 0;i < BUFMAX;i++)
 96     {
 97         if(buf[i] == NULL)
 98         {
 99             break;    
100         }
101     }
102     t->sec = n;
103     t->anytm = anytm;
104     strcpy(t->arg,(char *)p);
105     buf[i] = t;
106     return i;
107 
108     
109 }
110 
111 void anytime_destroy(void)
112 {
113     buf_break();
114     for(int i = 0;i < 1024;i++)
115     {
116         if(buf[i] != NULL)
117         {
118             free(buf[i]);
119             buf[i] = NULL;
120         }
121     }
122 }
123 
124 
125 
126 int main(void)
127 {
128     int i = 0;
129 
130     time_init(2,func,"hello");
131     time_init(4,func,"world");
132     time_init(6,func,"uplooking");
133 
134 
135 
136     while(1)
137     {
138         write(1,"*",1);
139         sleep(1);
140         i++;
141         if(i == 6)
142             anytime_destroy();
143 
144 
145 
146     }
147     
148     
149     exit(0);    
150 }