[ViewVC] Diff of: cebix/BasiliskII/src/Unix/timer

Comparing BasiliskII/src/Unix/timer_unix.cpp (file contents):
Revision 1.10 by cebix, 2001-07-06T17:36:08Z vs.
Revision 1.11 by cebix, 2001-07-09T11:22:00Z

+#include "macos_util.h"
+#include "timer.h"
-+
+#include <errno.h>
-+
+#define DEBUG 0
+#include "debug.h"
+                        return -t;                      // Time in negative microseconds
-+
-+
-+
+/*
-+
+ *  Get current value of microsecond timer
-+
+ */
-+
-+
+uint64 GetTicks_usec(void)
-+
+{
-+
+#ifdef HAVE_CLOCK_GETTIME
-+
+        struct timespec t;
-+
+        clock_gettime(CLOCK_REALTIME, &t);
-+
+        return (uint64)t.tv_sec * 1000000 + t.tv_nsec / 1000;
-+
+#else
-+
+        struct timeval t;
-+
+        gettimeofday(&t, NULL);
-+
+        return (uint64)t.tv_sec * 1000000 + t.tv_usec;
-+
+#endif
-+
+}
-+
-+
-+
+/*
-+
+ *  Delay by specified number of microseconds (<1 second)
-+
+ *  (adapted from SDL_Delay() source; this function is designed to provide
-+
+ *  the highest accuracy possible)
-+
+ */
-+
-+
+#if defined(linux)
-+
+// Linux select() changes its timeout parameter upon return to contain
-+
+// the remaining time. Most other unixen leave it unchanged or undefined.
-+
+#define SELECT_SETS_REMAINING
-+
+#elif defined(__FreeBSD__) || defined(__sun__)
-+
+#define USE_NANOSLEEP
-+
+#elif defined(HAVE_PTHREADS) && defined(sgi)
-+
+// SGI pthreads has a bug when using pthreads+signals+nanosleep,
-+
+// so instead of using nanosleep, wait on a CV which is never signalled.
-+
+#define USE_COND_TIMEDWAIT
-+
+#endif
-+
-+
+void Delay_usec(uint32 usec)
-+
+{
-+
+        int was_error;
-+
-+
+#if defined(USE_NANOSLEEP)
-+
+        struct timespec elapsed, tv;
-+
+#elif defined(USE_COND_TIMEDWAIT)
-+
+        // Use a local mutex and cv, so threads remain independent
-+
+        pthread_cond_t delay_cond = PTHREAD_COND_INITIALIZER;
-+
+        pthread_mutex_t delay_mutex = PTHREAD_MUTEX_INITIALIZER;
-+
+        struct timespec elapsed;
-+
+        uint64 future;
-+
+#else
-+
+        struct timeval tv;
-+
+#ifndef SELECT_SETS_REMAINING
-+
+        uint64 then, now, elapsed;
-+
+#endif
-+
+#endif
-+
-+
+        // Set the timeout interval - Linux only needs to do this once
-+
+#if defined(SELECT_SETS_REMAINING)
-+
+    tv.tv_sec = 0;
-+
+    tv.tv_usec = usec;
-+
+#elif defined(USE_NANOSLEEP)
-+
+    elapsed.tv_sec = 0;
-+
+    elapsed.tv_nsec = usec * 1000;
-+
+#elif defined(USE_COND_TIMEDWAIT)
-+
+        future = GetTicks_usec() + usec;
-+
+        elapsed.tv_sec = future / 1000000;
-+
+        elapsed.tv_nsec = (future % 1000000) * 1000;
-+
+#else
-+
+    then = GetTicks_usec();
-+
+#endif
-+
-+
+        do {
-+
+                errno = 0;
-+
+#if defined(USE_NANOSLEEP)
-+
+                tv.tv_sec = elapsed.tv_sec;
-+
+                tv.tv_nsec = elapsed.tv_nsec;
-+
+                was_error = nanosleep(&tv, &elapsed);
-+
+#elif defined(USE_COND_TIMEDWAIT)
-+
+                was_error = pthread_mutex_lock(&delay_mutex);
-+
+                was_error = pthread_cond_timedwait(&delay_cond, &delay_mutex, &elapsed);
-+
+                was_error = pthread_mutex_unlock(&delay_mutex);
-+
+#else
-+
+#ifndef SELECT_SETS_REMAINING
-+
+                // Calculate the time interval left (in case of interrupt)
-+
+                now = GetTicks_usec();
-+
+                elapsed = now - then;
-+
+                then = now;
-+
+                if (elapsed >= usec)
-+
+                        break;
-+
+                usec -= elapsed;
-+
+                tv.tv_sec = 0;
-+
+                tv.tv_usec = usec;
-+
+#endif
-+
+                was_error = select(0, NULL, NULL, NULL, &tv);
-+
+#endif
-+
+        } while (was_error && (errno == EINTR));
-+
+}

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Comparing BasiliskII/src/Unix/timer_unix.cpp (file contents): Revision 1.10 by cebix, 2001-07-06T17:36:08Z vs. Revision 1.11 by cebix, 2001-07-09T11:22:00Z

Diff Legend

Comparing BasiliskII/src/Unix/timer_unix.cpp (file contents):
Revision 1.10 by cebix, 2001-07-06T17:36:08Z vs.
Revision 1.11 by cebix, 2001-07-09T11:22:00Z