Initial commit

posix/Timer.c

@@ -0,0 +1,82 @@
+#define _POSIX_C_SOURCE 200112L
+#include "../CgeTimer.h"
+#include <stdlib.h>
+#include <sys/time.h>
+#include <time.h>
+#include <unistd.h>
+
+enum Type {
+    TYPE_UNDEFINED,
+    TYPE_OLD_REALTIME,
+    TYPE_NEW_REALTIME,
+    TYPE_MONOTONIC
+};
+
+static int timerType = TYPE_UNDEFINED;
+
+static int checkAvailableTimer(void) {
+#if (_POSIX_TIMERS > 0)
+    struct timespec ts;
+#endif
+
+    if (timerType != TYPE_UNDEFINED)
+        return timerType;
+
+#if (_POSIX_TIMERS > 0)
+    if (!clock_gettime(CLOCK_MONOTONIC, &ts)) {
+        timerType = TYPE_MONOTONIC;
+    } else if (!clock_gettime(CLOCK_REALTIME, &ts)) {
+        timerType = TYPE_NEW_REALTIME;
+    } else
+#endif
+    timerType = TYPE_OLD_REALTIME;
+    return timerType;
+}
+
+static void getTimer(uint64_t *sec, uint64_t *nsec) {
+#if (_POSIX_TIMERS > 0)
+    struct timespec ts;
+#endif
+    struct timeval tv;
+
+    switch (checkAvailableTimer()) {
+#if (_POSIX_TIMERS > 0)
+    case TYPE_MONOTONIC:
+        clock_gettime(CLOCK_MONOTONIC, &ts);
+        *sec = ts.tv_sec;
+        *nsec = ts.tv_nsec;
+        break;
+
+    case TYPE_NEW_REALTIME:
+        clock_gettime(CLOCK_REALTIME, &ts);
+        *sec = ts.tv_sec;
+        *nsec = ts.tv_nsec;
+        break;
+#endif
+
+    default:
+    case TYPE_OLD_REALTIME:
+        gettimeofday(&tv, NULL);
+        *sec = tv.tv_sec;
+        *nsec = tv.tv_usec * (uint64_t)1000;
+        break;
+    }
+}
+
+int CgeTimerIsMonotonic(void) {
+    return checkAvailableTimer() == TYPE_MONOTONIC;
+}
+
+uint64_t CgeTimerMilliseconds(void) {
+    uint64_t newSec, newNsec;
+
+    getTimer(&newSec, &newNsec);
+    return (newSec * 1000u) + (newNsec / 1000000ul);
+}
+
+uint64_t CgeTimerNanoseconds(void) {
+    uint64_t newSec, newNsec;
+
+    getTimer(&newSec, &newNsec);
+    return (newSec * 1000000000ul) + newNsec;
+}