From 317c9d54284844615b33a25834a63248bf1bfa73 Mon Sep 17 00:00:00 2001
From: David 'Digit' Turner <digit@android.com>
Date: Tue, 10 May 2011 06:38:21 +0200
Subject: qemu-timer.c: upstream integrate

Change-Id: I6856ded73b4dcd10fe4831697c8518f958aeffbb
---
 qemu-timer-common.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 qemu-timer-common.c

(limited to 'qemu-timer-common.c')

diff --git a/qemu-timer-common.c b/qemu-timer-common.c
new file mode 100644
index 0000000..755e300
--- /dev/null
+++ b/qemu-timer-common.c
@@ -0,0 +1,63 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "qemu-timer.h"
+
+/***********************************************************/
+/* real time host monotonic timer */
+
+#ifdef _WIN32
+
+int64_t clock_freq;
+
+static void __attribute__((constructor)) init_get_clock(void)
+{
+    LARGE_INTEGER freq;
+    int ret;
+    ret = QueryPerformanceFrequency(&freq);
+    if (ret == 0) {
+        fprintf(stderr, "Could not calibrate ticks\n");
+        exit(1);
+    }
+    clock_freq = freq.QuadPart;
+}
+
+#else
+
+int use_rt_clock;
+
+static void __attribute__((constructor)) init_get_clock(void)
+{
+    use_rt_clock = 0;
+#if defined(__linux__) || (defined(__FreeBSD__) && __FreeBSD_version >= 500000) \
+    || defined(__DragonFly__) || defined(__FreeBSD_kernel__) \
+    || defined(__OpenBSD__)
+    {
+        struct timespec ts;
+        if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
+            use_rt_clock = 1;
+        }
+    }
+#endif
+}
+#endif
-- 
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