1 files changed, 137 insertions, 0 deletions
diff --git a/pjlib/src/pj/os_timestamp_linux.c b/pjlib/src/pj/os_timestamp_linux.c
new file mode 100644
index 00000000..52639dcd
--- /dev/null
+++ b/pjlib/src/pj/os_timestamp_linux.c
@@ -0,0 +1,137 @@
+/* $Header: /pjproject-0.3/pjlib/src/pj/os_timestamp_linux.c 4     10/29/05 10:27p Bennylp $ */
+/* $Log: /pjproject-0.3/pjlib/src/pj/os_timestamp_linux.c $
+ * 
+ * 4     10/29/05 10:27p Bennylp
+ * Fixed misc warnings.
+ * 
+ * 3     10/29/05 11:51a Bennylp
+ * Version 0.3-pre2.
+ * 
+ * 2     9/21/05 1:39p Bennylp
+ * Periodic checkin for backup.
+ * 
+ * 1     9/18/05 9:25p Bennylp
+ * Created.
+ * 
+ */
+#include <pj/os.h>
+#include <pj/errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#if defined(PJ_HAS_PENTIUM) && PJ_HAS_PENTIUM!=0
+static int machine_speed_mhz;
+static pj_timestamp machine_speed;
+
+static __inline__ unsigned long long int rdtsc()
+{
+    unsigned long long int x;
+    __asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
+    return x;
+}
+
+/* Determine machine's CPU MHz to get the counter's frequency.
+ */
+static int get_machine_speed_mhz()
+{
+    FILE *strm;
+    char buf[512];
+    int len;
+    char *pos, *end;
+	
+    PJ_CHECK_STACK();
+	
+    /* Open /proc/cpuinfo and read the file */
+    strm = fopen("/proc/cpuinfo", "r");
+    if (!strm)
+        return -1;
+    len = fread(buf, 1, sizeof(buf), strm);
+    fclose(strm);
+    if (len < 1) {
+        return -1;
+    }
+    buf[len] = '\0';
+
+    /* Locate the MHz digit. */
+    pos = strstr(buf, "cpu MHz");
+    if (!pos)
+        return -1;
+    pos = strchr(pos, ':');
+    if (!pos)
+        return -1;
+    end = (pos += 2);
+    while (isdigit(*end)) ++end;
+    *end = '\0';
+
+    /* Return the Mhz part, and give it a +1. */
+    return atoi(pos)+1;
+}
+
+PJ_DEF(pj_status_t) pj_get_timestamp(pj_timestamp *ts)
+{
+    if (machine_speed_mhz == 0) {
+	machine_speed_mhz = get_machine_speed_mhz();
+	if (machine_speed_mhz > 0) {
+	    machine_speed.u64 = machine_speed_mhz * 1000000.0;
+	}
+    }
+    
+    if (machine_speed_mhz == -1) {
+	ts->u64 = 0;
+	return -1;
+    } 
+    ts->u64 = rdtsc();
+    return 0;
+}
+
+PJ_DEF(pj_status_t) pj_get_timestamp_freq(pj_timestamp *freq)
+{
+    if (machine_speed_mhz == 0) {
+	machine_speed_mhz = get_machine_speed_mhz();
+	if (machine_speed_mhz > 0) {
+	    machine_speed.u64 = machine_speed_mhz * 1000000.0;
+	}
+    }
+    
+    if (machine_speed_mhz == -1) {
+	freq->u64 = 1;	/* return 1 to prevent division by zero in apps. */
+	return -1;
+    } 
+
+    freq->u64 = machine_speed.u64;
+    return 0;
+}
+
+#else
+#include <sys/time.h>
+#include <errno.h>
+
+#define USEC_PER_SEC	1000000
+
+PJ_DEF(pj_status_t) pj_get_timestamp(pj_timestamp *ts)
+{
+    struct timeval tv;
+
+    if (gettimeofday(&tv, NULL) != 0) {
+	return PJ_RETURN_OS_ERROR(pj_get_native_os_error());
+    }
+
+    ts->u64 = tv.tv_sec;
+    ts->u64 *= USEC_PER_SEC;
+    ts->u64 += tv.tv_usec;
+
+    return PJ_SUCCESS;
+}
+
+PJ_DEF(pj_status_t) pj_get_timestamp_freq(pj_timestamp *freq)
+{
+    freq->u32.hi = 0;
+    freq->u32.lo = USEC_PER_SEC;
+
+    return PJ_SUCCESS;
+}
+
+#endif
+