Track forgotten timer files.

2 files changed, 89 insertions, 0 deletions

diff --git a/timer.c b/timer.c
new file mode 100644
index 0000000..f918009
--- /dev/null
+++ b/timer.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2019 Anton Khirnov <anton@khirnov.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+
+#include "timer.h"
+
+void mg2di_timer_init(Timer *t)
+{
+    t->time_nsec = 0;
+    t->nb_runs   = 0;
+    t->start     = INT64_MIN;
+}
diff --git a/timer.h b/timer.h
new file mode 100644
index 0000000..f88b1aa
--- /dev/null
+++ b/timer.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2019 Anton Khirnov <anton@khirnov.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MG2D_TIMER_H
+#define MG2D_TIMER_H
+
+#include <stdint.h>
+#include <time.h>
+
+#include "common.h"
+
+typedef struct Timer {
+    int64_t time_nsec;
+    int64_t nb_runs;
+    int64_t start;
+} Timer;
+
+void mg2di_timer_init(Timer *t);
+
+static inline void mg2di_timer_start(Timer *t)
+{
+    struct timespec tp;
+    int ret;
+
+    mg2di_assert(t->start == INT64_MIN);
+
+    ret = clock_gettime(CLOCK_MONOTONIC, &tp);
+    mg2di_assert(ret == 0);
+
+    t->start = (int64_t)tp.tv_sec * 1000000000L + tp.tv_nsec;
+}
+
+static inline void mg2di_timer_stop(Timer *t)
+{
+    struct timespec tp;
+    int ret;
+
+    mg2di_assert(t->start != INT64_MIN);
+
+    ret = clock_gettime(CLOCK_MONOTONIC, &tp);
+    mg2di_assert(ret == 0);
+
+    t->time_nsec += (int64_t)tp.tv_sec * 1000000000L + tp.tv_nsec - t->start;
+    t->nb_runs++;
+    t->start = INT64_MIN;
+}
+
+#endif // MG2D_TIMER_H