Merge "Initial commit: cframework. Longbow and Libparc" into cframework/master

1 files changed, 62 insertions, 0 deletions

diff --git a/libparc/parc/developer/parc_TimingLinux.h b/libparc/parc/developer/parc_TimingLinux.h
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+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file parc_TimingLinux.h
+ * @brief Macros for timing code
+ *
+ * On linux will use clock_gettime with the MONOTONIC RAW clock, which does not speed up or slow down based on adj_time().
+ *
+ */
+#ifndef libparc_parc_TimingLinux_h
+#define libparc_parc_TimingLinux_h
+
+#ifdef PARCTIMING_LINUX
+#include <stdint.h>
+#include <time.h>
+#include <sys/time.h>
+
+#define _private_parcTiming_Init(prefix) \
+    struct timespec prefix ## _ts0, prefix ## _ts1;
+
+#define _private_parcTiming_Start(prefix) \
+    clock_gettime(CLOCK_MONOTONIC_RAW, &(prefix ## _ts0));
+
+#define _private_parcTiming_Stop(prefix) \
+    clock_gettime(CLOCK_MONOTONIC_RAW, &(prefix ## _ts1));
+
+static inline uint64_t
+_parcTimingLinux_Delta(const struct timespec *t0, const struct timespec *t1)
+{
+    struct timespec delta;
+
+    delta.tv_sec = t1->tv_sec - t0->tv_sec;
+    delta.tv_nsec = t1->tv_nsec - t0->tv_nsec;
+    if (delta.tv_nsec < 0) {
+        --delta.tv_sec;
+        delta.tv_nsec += 1000000000;
+    }
+
+    return (uint64_t) delta.tv_sec * 1000000000ULL + delta.tv_nsec;
+}
+
+#define _private_parcTiming_Delta(prefix) _parcTimingLinux_Delta(&(prefix ## _ts0), &(prefix ## _ts1))
+
+// No teardown work that we need to do
+#define _private_parcTiming_Fini(prefix)
+
+#endif // PARCTIMING_LINUX
+#endif // libparc_parc_TimingLinux_h
+