1 files changed, 74 insertions, 0 deletions
diff --git a/gettime.h b/gettime.h
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--- /dev/null
+++ b/gettime.h
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+/**************************************************************************
+ *
+ * Copyright 2014, 2017 The Android Open Source Project
+ *
+ * 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.
+ *
+ * Ported from drawElements Utility Library (Google, Inc.)
+ * Port done by: Ian Elliott <ianelliott@google.com>
+ **************************************************************************/
+
+#include <time.h>
+#include <assert.h>
+#include <vulkan/vk_platform.h>
+
+#if defined(_WIN32)
+
+#include <windows.h>
+
+#elif defined(__unix__) || defined(__linux) || defined(__linux__) || defined(__ANDROID__) || defined(__EPOC32__) || defined(__QNX__)
+
+#include <time.h>
+
+#elif defined(__APPLE__)
+
+#include <sys/time.h>
+
+#endif
+
+uint64_t getTimeInNanoseconds(void) {
+#if defined(_WIN32)
+    LARGE_INTEGER freq;
+    LARGE_INTEGER count;
+    QueryPerformanceCounter(&count);
+    QueryPerformanceFrequency(&freq);
+    assert(freq.LowPart != 0 || freq.HighPart != 0);
+
+    if (count.QuadPart < MAXLONGLONG / 1000000) {
+        assert(freq.QuadPart != 0);
+        return count.QuadPart * 1000000 / freq.QuadPart;
+    } else {
+        assert(freq.QuadPart >= 1000000);
+        return count.QuadPart / (freq.QuadPart / 1000000);
+    }
+
+#elif defined(__unix__) || defined(__linux) || defined(__linux__) || defined(__ANDROID__) || defined(__QNX__)
+    struct timespec currTime;
+    clock_gettime(CLOCK_MONOTONIC, &currTime);
+    return (uint64_t)currTime.tv_sec * 1000000 + ((uint64_t)currTime.tv_nsec / 1000);
+
+#elif defined(__EPOC32__)
+    struct timespec currTime;
+    /* Symbian supports only realtime clock for clock_gettime. */
+    clock_gettime(CLOCK_REALTIME, &currTime);
+    return (uint64_t)currTime.tv_sec * 1000000 + ((uint64_t)currTime.tv_nsec / 1000);
+
+#elif defined(__APPLE__)
+    struct timeval currTime;
+    gettimeofday(&currTime, NULL);
+    return (uint64_t)currTime.tv_sec * 1000000 + (uint64_t)currTime.tv_usec;
+
+#else
+#error "Not implemented for target OS"
+#endif
+}