testing/fastcgi-approach/main.c

   1 #define _BSD_SOURCE
   2 #include "fastcgi.h"
   3 #include "common.h"
   4 #include <time.h>
   5
   6 typedef struct Data {
   7         pthread_t sensors;
   8         pthread_mutex_t mutex;
   9         volatile int sensor_value;
  10 } Data;
  11
  12 Data data;
  13
  14 void Handler_Sensors(FCGIContext *context, char *params)
  15 {
  16         const char *key, *value;
  17
  18         //Begin a request only when you know the final result
  19         //E.g whether OK or not.
  20         FCGI_BeginJSON(context, STATUS_OK);
  21         while ((params = FCGI_KeyPair(params, &key, &value))) {
  22                 FCGI_JSONPair(key, value);
  23         }
  24         pthread_mutex_lock(&(data.mutex));
  25         FCGI_JSONLong("sensor_value", data.sensor_value);
  26         pthread_mutex_unlock(&(data.mutex));
  27         FCGI_EndJSON();
  28 }
  29
  30 void *SensorsLoop(void *arg) {
  31         srand(time(NULL));
  32         //Csection
  33         while(1) {
  34                 pthread_mutex_lock(&(data.mutex));
  35                 data.sensor_value = rand() % 1024;
  36                 pthread_mutex_unlock(&(data.mutex));
  37                 usleep(200*1000); //200ms
  38         }
  39 }
  40
  41 int main(int argc, char *argv[]) {
  42         pthread_mutex_init(&(data.mutex), NULL);
  43         //data.mutex = PTHREAD_MUTEX_INITIALIZER;
  44
  45         pthread_create(&data.sensors, NULL, SensorsLoop, &data);
  46         FCGI_RequestLoop(&data);
  47 }