From b5a1af6f999820564ead4867b1e5d5574778ee56 Mon Sep 17 00:00:00 2001
From: Benny Prijono <bennylp@teluu.com>
Date: Mon, 31 Oct 2005 21:02:30 +0000
Subject: initial import

git-svn-id: http://svn.pjsip.org/repos/pjproject/main@1 74dad513-b988-da41-8d7b-12977e46ad98
---
 pjlib/src/pj/os_timestamp_common.c | 129 +++++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 pjlib/src/pj/os_timestamp_common.c

(limited to 'pjlib/src/pj/os_timestamp_common.c')

diff --git a/pjlib/src/pj/os_timestamp_common.c b/pjlib/src/pj/os_timestamp_common.c
new file mode 100644
index 00000000..630ffb27
--- /dev/null
+++ b/pjlib/src/pj/os_timestamp_common.c
@@ -0,0 +1,129 @@
+/* $Header: /pjproject-0.3/pjlib/src/pj/os_timestamp_common.c 2     10/14/05 12:26a Bennylp $ */
+/* 
+ * $Log: /pjproject-0.3/pjlib/src/pj/os_timestamp_common.c $
+ * 
+ * 2     10/14/05 12:26a Bennylp
+ * Finished error code framework, some fixes in ioqueue, etc. Pretty
+ * major.
+ * 
+ * 1     10/09/05 2:56p Bennylp
+ * Created.
+ * 
+ */
+#include <pj/os.h>
+#include <pj/compat/high_precision.h>
+
+#if defined(PJ_HAS_HIGH_RES_TIMER) && PJ_HAS_HIGH_RES_TIMER != 0
+
+#define U32MAX  (0xFFFFFFFFUL)
+#define NANOSEC (1000000000UL)
+#define USEC    (1000000UL)
+#define MSEC    (1000)
+
+static pj_highprec_t get_elapsed( const pj_timestamp *start,
+                                  const pj_timestamp *stop )
+{
+    pj_highprec_t elapsed_hi, elapsed_lo;
+
+    elapsed_hi = stop->u32.hi - start->u32.hi;
+    elapsed_lo = stop->u32.lo - start->u32.lo;
+
+    /* elapsed_hi = elapsed_hi * U32MAX */
+    pj_highprec_mul(elapsed_hi, U32MAX);
+
+    return elapsed_hi + elapsed_lo;
+}
+
+static pj_highprec_t elapsed_usec( const pj_timestamp *start,
+                                   const pj_timestamp *stop )
+{
+    pj_timestamp ts_freq;
+    pj_highprec_t freq, elapsed;
+
+    if (pj_get_timestamp_freq(&ts_freq) != PJ_SUCCESS)
+        return 0;
+
+    /* Convert frequency timestamp */
+    freq = ts_freq.u32.hi;
+    pj_highprec_mul(freq, U32MAX);
+    freq += ts_freq.u32.lo;
+
+    /* Avoid division by zero. */
+    if (freq == 0) freq = 1;
+
+    /* Get elapsed time in cycles. */
+    elapsed = get_elapsed(start, stop);
+
+    /* usec = elapsed * USEC / freq */
+    pj_highprec_mul(elapsed, USEC);
+    pj_highprec_div(elapsed, freq);
+
+    return elapsed;
+}
+
+PJ_DEF(pj_uint32_t) pj_elapsed_nanosec( const pj_timestamp *start,
+                                        const pj_timestamp *stop )
+{
+    pj_timestamp ts_freq;
+    pj_highprec_t freq, elapsed;
+
+    if (pj_get_timestamp_freq(&ts_freq) != PJ_SUCCESS)
+        return 0;
+
+    /* Convert frequency timestamp */
+    freq = ts_freq.u32.hi;
+    pj_highprec_mul(freq, U32MAX);
+    freq += ts_freq.u32.lo;
+
+    /* Avoid division by zero. */
+    if (freq == 0) freq = 1;
+
+    /* Get elapsed time in cycles. */
+    elapsed = get_elapsed(start, stop);
+
+    /* usec = elapsed * USEC / freq */
+    pj_highprec_mul(elapsed, NANOSEC);
+    pj_highprec_div(elapsed, freq);
+
+    return (pj_uint32_t)elapsed;
+}
+
+PJ_DEF(pj_uint32_t) pj_elapsed_usec( const pj_timestamp *start,
+                                     const pj_timestamp *stop )
+{
+    return (pj_uint32_t)elapsed_usec(start, stop);
+}
+
+PJ_DEF(pj_time_val) pj_elapsed_time( const pj_timestamp *start,
+                                     const pj_timestamp *stop )
+{
+    pj_highprec_t elapsed = elapsed_usec(start, stop);
+    pj_time_val tv_elapsed;
+
+    if (PJ_HIGHPREC_VALUE_IS_ZERO(elapsed)) {
+        tv_elapsed.sec = tv_elapsed.msec = 0;
+        return tv_elapsed;
+    } else {
+        pj_highprec_t sec, msec;
+
+        sec = elapsed;
+        pj_highprec_div(sec, USEC);
+        tv_elapsed.sec = (long)sec;
+
+        msec = elapsed;
+        pj_highprec_mod(msec, USEC);
+        pj_highprec_div(msec, 1000);
+        tv_elapsed.msec = (long)msec;
+
+        return tv_elapsed;
+    }
+}
+
+PJ_DEF(pj_uint32_t) pj_elapsed_cycle( const pj_timestamp *start,
+                                      const pj_timestamp *stop )
+{
+    return stop->u32.lo - start->u32.lo;
+}
+
+#endif  /* PJ_HAS_HIGH_RES_TIMER */
+
-- 
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