Change from usleep and gettimeofday to clock_nanosleep and clock_gettime

[matches/MCTX3420.git] / server / sensor.c

diff --git a/server/sensor.c b/server/sensor.c
index e136988..8cc8c82 100644 (file)
--- a/server/sensor.c
+++ b/server/sensor.c
@@ -47,7 +47,8 @@ int Sensor_Add(const char * name, int user_id, ReadFn read, InitFn init, CleanFn
        s->init = init; // Set init function
 
        // Start by averaging values taken over a second
-       s->sample_us = 1e6;
+       s->sample_time.tv_sec = 1;
+       s->sample_time.tv_nsec = 0;
        s->averages = 1;
 
        // Set sanity function
@@ -75,9 +76,9 @@ void Sensor_Init()
 {
        Sensor_Add("cpu_stime", RESOURCE_CPU_SYS, Resource_Read, NULL, NULL, NULL);     
        Sensor_Add("cpu_utime", RESOURCE_CPU_USER, Resource_Read, NULL, NULL, NULL);    
-       Sensor_Add("pressure_high0", PRES_HIGH0, Pressure_Read, Pressure_Init, Pressure_Cleanup, NULL);
-       Sensor_Add("pressure_high1", PRES_HIGH1, Pressure_Read, Pressure_Init, Pressure_Cleanup, NULL);
-       Sensor_Add("pressure_low0", PRES_LOW0, Pressure_Read, Pressure_Init, Pressure_Cleanup, NULL);
+       //Sensor_Add("pressure_high0", PRES_HIGH0, Pressure_Read, Pressure_Init, Pressure_Cleanup, NULL);
+       //Sensor_Add("pressure_high1", PRES_HIGH1, Pressure_Read, Pressure_Init, Pressure_Cleanup, NULL);
+       //Sensor_Add("pressure_low0", PRES_LOW0, Pressure_Read, Pressure_Init, Pressure_Cleanup, NULL);
        //Sensor_Add("../testing/count.py", 0, Piped_Read, Piped_Init, Piped_Cleanup, 1e50,-1e50,1e50,-1e50);
        //Sensor_Add("strain0", STRAIN0, Strain_Read, Strain_Init, 5000,0,5000,0);
        //Sensor_Add("strain1", STRAIN1, Strain_Read, Strain_Init, 5000,0,5000,0);
@@ -199,8 +200,8 @@ void * Sensor_Loop(void * arg)
                d.value = 0;
                bool success = s->read(s->user_id, &(d.value));
 
-               struct timeval t;
-               gettimeofday(&t, NULL);
+               struct timespec t;
+               clock_gettime(CLOCK_MONOTONIC, &t);
                d.time_stamp = TIMEVAL_DIFF(t, *Control_GetStartTime());        
                
                if (success)
@@ -217,7 +218,9 @@ void * Sensor_Loop(void * arg)
                else
                        Log(LOGWARN, "Failed to read sensor %s (%d,%d)", s->name, s->id,s->user_id);
 
-               usleep(s->sample_us);
+
+               clock_nanosleep(CLOCK_MONOTONIC, 0, &(s->sample_time), NULL);
+               
        }
        
        // Needed to keep pthreads happy
@@ -288,8 +291,8 @@ void Sensor_EndResponse(FCGIContext * context, Sensor * s, DataFormat format)
  */
 void Sensor_Handler(FCGIContext *context, char * params)
 {
-       struct timeval now;
-       gettimeofday(&now, NULL);
+       struct timespec now;
+       clock_gettime(CLOCK_MONOTONIC, &now);
        double current_time = TIMEVAL_DIFF(now, *Control_GetStartTime());
 
        int id = 0;
@@ -364,7 +367,7 @@ void Sensor_Handler(FCGIContext *context, char * params)
                        FCGI_RejectJSON(context, "Negative sampling speed!");
                        return;
                }               
-               s->sample_us = 1e6*sample_s;
+               DOUBLE_TO_TIMEVAL(sample_s, &(s->sample_time));
        }