move libs/utils to libutils

Change-Id: I6cf4268599460791414882f91eeb88a992fbd29d

1 files changed, 72 insertions, 0 deletions

diff --git a/libutils/Timers.cpp b/libutils/Timers.cpp
new file mode 100644
index 0000000..5293cd2
--- /dev/null
+++ b/libutils/Timers.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2005 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.
+ */
+
+//
+// Timer functions.
+//
+#include <utils/Timers.h>
+#include <utils/Log.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <time.h>
+#include <errno.h>
+#include <limits.h>
+
+#ifdef HAVE_WIN32_THREADS
+#include <windows.h>
+#endif
+
+nsecs_t systemTime(int clock)
+{
+#if defined(HAVE_POSIX_CLOCKS)
+    static const clockid_t clocks[] = {
+            CLOCK_REALTIME,
+            CLOCK_MONOTONIC,
+            CLOCK_PROCESS_CPUTIME_ID,
+            CLOCK_THREAD_CPUTIME_ID,
+            CLOCK_BOOTTIME
+    };
+    struct timespec t;
+    t.tv_sec = t.tv_nsec = 0;
+    clock_gettime(clocks[clock], &t);
+    return nsecs_t(t.tv_sec)*1000000000LL + t.tv_nsec;
+#else
+    // we don't support the clocks here.
+    struct timeval t;
+    t.tv_sec = t.tv_usec = 0;
+    gettimeofday(&t, NULL);
+    return nsecs_t(t.tv_sec)*1000000000LL + nsecs_t(t.tv_usec)*1000LL;
+#endif
+}
+
+int toMillisecondTimeoutDelay(nsecs_t referenceTime, nsecs_t timeoutTime)
+{
+    int timeoutDelayMillis;
+    if (timeoutTime > referenceTime) {
+        uint64_t timeoutDelay = uint64_t(timeoutTime - referenceTime);
+        if (timeoutDelay > uint64_t((INT_MAX - 1) * 1000000LL)) {
+            timeoutDelayMillis = -1;
+        } else {
+            timeoutDelayMillis = (timeoutDelay + 999999LL) / 1000000LL;
+        }
+    } else {
+        timeoutDelayMillis = 0;
+    }
+    return timeoutDelayMillis;
+}