Initial revision

src/osg/Timer.cpp

@@ -0,0 +1,205 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include <osg/Timer>
+
+
+using namespace osg;
+
+#ifdef WIN32 // [
+
+#include <windows.h>
+#include <winbase.h>
+
+int Timer::inited = 0;
+double Timer::cpu_mhz = 0.0;
+
+void Timer::init( void )
+{
+    Timer_t start_time = tick();
+    Sleep (1000);
+    Timer_t end_time = tick();
+    cpu_mhz = (double)(end_time-start_time)*1e-6;
+    inited = 1;
+}
+
+Timer::Timer( void )
+{
+     if( !inited ) init();
+}
+
+Timer::~Timer( void )
+{
+}
+
+double Timer::delta_s( Timer_t t1, Timer_t t2 )
+{
+    Timer_t delta = t2 - t1;
+    return (((double)delta/cpu_mhz)*1e-6);
+}
+
+double Timer::delta_m( Timer_t t1, Timer_t t2 )
+{
+    Timer_t delta = t2 - t1;
+    return (((double)delta/cpu_mhz)*1e-3);
+}
+
+Timer_t Timer::delta_u( Timer_t t0, Timer_t t1 )
+{
+    return (Timer_t)((double)(t1 - t0)/cpu_mhz);
+}
+
+Timer_t Timer::delta_n( Timer_t t0, Timer_t t1 )
+{
+    return (Timer_t)((double)(t1 - t0) * 1e3/cpu_mhz);
+}
+
+#endif // ]
+
+#ifdef __linux // [
+#include <unistd.h>
+#include <sys/mman.h>
+
+int Timer::inited = 0;
+double Timer::cpu_mhz = 0.0;
+
+void Timer::init( void )
+{
+    char buff[128];
+    FILE *fp = fopen( "/proc/cpuinfo", "r" );
+
+    while( fgets( buff, sizeof( buff ), fp ) > 0 )
+    {
+        if( !strncmp( buff, "cpu MHz", strlen( "cpu MHz" )))
+	{
+	    char *ptr = buff;
+
+	    while( ptr && *ptr != ':' ) ptr++;
+	    if( ptr ) 
+	    {
+	      ptr++;
+	      sscanf( ptr, "%lf", &cpu_mhz );
+	    }
+	    break;
+	}
+    }
+    fclose( fp );
+    inited = 1;
+}
+
+Timer::Timer( void )
+{
+     if( !inited ) init();
+}
+
+Timer::~Timer( void )
+{
+}
+
+double Timer::delta_s( Timer_t t1, Timer_t t2 )
+{
+    Timer_t delta = t2 - t1;
+    return ((double)delta/cpu_mhz*1e-6);
+}
+
+double Timer::delta_m( Timer_t t1, Timer_t t2 )
+{
+    Timer_t delta = t2 - t1;
+    return ((double)delta/cpu_mhz*1e-3);
+}
+
+Timer_t Timer::delta_u( Timer_t t0, Timer_t t1 )
+{
+    return (Timer_t)((double)(t1 - t0)/cpu_mhz);
+}
+
+Timer_t Timer::delta_n( Timer_t t0, Timer_t t1 )
+{
+    return (Timer_t)((double)(t1 - t0) * 1e3/cpu_mhz);
+}
+
+#endif // ]
+#ifdef __sgi // [
+
+
+#include <unistd.h>
+#include <sys/syssgi.h>
+#include <sys/immu.h>
+#include <sys/mman.h>
+
+unsigned long Timer::dummy = 0;
+
+
+Timer::Timer( void )
+{
+    __psunsigned_t phys_addr, raddr;
+    unsigned int cycleval;
+    volatile unsigned long counter_value, *iotimer_addr;
+    int fd, poffmask;
+
+    poffmask     = getpagesize() - 1;
+    phys_addr     = syssgi( SGI_QUERY_CYCLECNTR, &cycleval );
+    microseconds_per_click = (double)cycleval/1e6;
+    nanoseconds_per_click  = (double)cycleval/1e3;
+    raddr        = phys_addr & ~poffmask;
+
+    clk = &dummy;
+
+    if( (fd = open( "/dev/mmem", O_RDONLY )) < 0 )
+    {
+        perror( "/dev/mmem" );
+        return;
+    }
+
+
+    iotimer_addr = (volatile unsigned long *)mmap(
+            (void *)0L,
+            (size_t)poffmask,
+            (int)PROT_READ,
+            (int)MAP_PRIVATE, fd, (off_t)raddr);
+
+    iotimer_addr = (unsigned long *)(
+                    (__psunsigned_t)iotimer_addr + (phys_addr & poffmask)
+                    );
+
+
+    cycleCntrSize = syssgi( SGI_CYCLECNTR_SIZE );
+
+    if( cycleCntrSize > 32 ) 
+        ++iotimer_addr;
+
+    clk = (unsigned long *)iotimer_addr;
+}
+
+Timer::~Timer( void )
+{
+}
+
+double Timer::delta_s( Timer_t t1, Timer_t t2 )
+{
+    Timer_t delta = t2 - t1;
+    return ((double)delta * microseconds_per_click*1e-6);
+}
+
+double Timer::delta_m( Timer_t t1, Timer_t t2 )
+{
+    Timer_t delta = t2 - t1;
+    return ((double)delta * microseconds_per_click*1e-3);
+}
+
+Timer_t Timer::delta_u( Timer_t t1, Timer_t t2 )
+{
+    Timer_t delta = t2 - t1;
+    return (Timer_t)((double)delta * microseconds_per_click);
+}
+
+Timer_t Timer::delta_n( Timer_t t1, Timer_t t2 )
+{
+    unsigned long delta = t2 - t1;
+    return (Timer_t )((double)delta * nanoseconds_per_click);
+}
+
+#endif // ]