-/* Implementation of the CPU_TIME intrinsic.
- Copyright (C) 2003, 2007, 2009 Free Software Foundation, Inc.
+/* Wrappers for platform timing functions.
+ Copyright (C) 2003, 2007, 2009, 2011 Free Software Foundation, Inc.
-This file is part of the GNU Fortran 95 runtime library (libgfortran).
+This file is part of the GNU Fortran runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
#include <unistd.h>
#endif
+#include <errno.h>
+
/* The time related intrinsics (DTIME, ETIME, CPU_TIME) to "compare
different algorithms on the same computer or discover which parts
are the most expensive", need a way to get the CPU time with the
# endif
#endif
+#ifdef HAVE_SYS_TYPES_H
+ #include <sys/types.h>
+#endif
+
/* The most accurate way to get the CPU time is getrusage (). */
#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
# include <sys/resource.h>
#endif /* HAVE_GETRUSAGE && HAVE_SYS_RESOURCE_H */
+/* The most accurate way to get the CPU time is getrusage ().
+ If we have times(), that's good enough, too. */
+#if !defined (HAVE_GETRUSAGE) || !defined (HAVE_SYS_RESOURCE_H)
+/* For times(), we _must_ know the number of clock ticks per second. */
+# if defined (HAVE_TIMES) && (defined (HZ) || defined (_SC_CLK_TCK) || defined (CLK_TCK))
+# ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+# endif
+# if defined (HAVE_SYS_TIMES_H)
+# include <sys/times.h>
+# endif
+# ifndef HZ
+# if defined _SC_CLK_TCK
+# define HZ sysconf(_SC_CLK_TCK)
+# else
+# define HZ CLK_TCK
+# endif
+# endif
+# endif /* HAVE_TIMES etc. */
+#endif /* !HAVE_GETRUSAGE || !HAVE_SYS_RESOURCE_H */
+
+
+/* If the re-entrant version of localtime is not available, provide a
+ fallback implementation. On some targets where the _r version is
+ not available, localtime uses thread-local storage so it's
+ threadsafe. */
+
+#ifndef HAVE_LOCALTIME_R
+/* If _POSIX is defined localtime_r gets defined by mingw-w64 headers. */
+#ifdef localtime_r
+#undef localtime_r
+#endif
+
+static inline struct tm *
+localtime_r (const time_t * timep, struct tm * result)
+{
+ *result = *localtime (timep);
+ return result;
+}
+#endif
+
+
#if defined (__GNUC__) && (__GNUC__ >= 3)
# define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
#else
# define ATTRIBUTE_ALWAYS_INLINE
#endif
-static inline int __time_1 (long *, long *, long *, long *) ATTRIBUTE_ALWAYS_INLINE;
+static inline int gf_cputime (long *, long *, long *, long *) ATTRIBUTE_ALWAYS_INLINE;
/* Helper function for the actual implementation of the DTIME, ETIME and
- CPU_TIME intrinsics. Returns a CPU time in microseconds or -1 if no
+ CPU_TIME intrinsics. Returns 0 for success or -1 if no
CPU time could be computed. */
#ifdef __MINGW32__
#include <windows.h>
static int
-__time_1 (long *user_sec, long *user_usec, long *system_sec, long *system_usec)
+gf_cputime (long *user_sec, long *user_usec, long *system_sec, long *system_usec)
{
union {
FILETIME ft;
#else
static inline int
-__time_1 (long *user_sec, long *user_usec, long *system_sec, long *system_usec)
+gf_cputime (long *user_sec, long *user_usec, long *system_sec, long *system_usec)
{
#if defined (HAVE_GETRUSAGE) && defined (HAVE_SYS_RESOURCE_H)
struct rusage usage;
- getrusage (0, &usage);
+ int err;
+ err = getrusage (RUSAGE_SELF, &usage);
*user_sec = usage.ru_utime.tv_sec;
*user_usec = usage.ru_utime.tv_usec;
*system_sec = usage.ru_stime.tv_sec;
*system_usec = usage.ru_stime.tv_usec;
+ return err;
+
+#elif defined HAVE_TIMES
+ struct tms buf;
+ clock_t err;
+ err = times (&buf);
+ *user_sec = buf.tms_utime / HZ;
+ *user_usec = buf.tms_utime % HZ * (1000000 / HZ);
+ *system_sec = buf.tms_stime / HZ;
+ *system_usec = buf.tms_stime % HZ * (1000000 / HZ);
+ if ((err == (clock_t) -1) && errno != 0)
+ return -1;
return 0;
-#else /* ! HAVE_GETRUSAGE || ! HAVE_SYS_RESOURCE_H */
+#else
/* We have nothing to go on. Return -1. */
*user_sec = *system_sec = 0;
*user_usec = *system_usec = 0;
+ errno = ENOSYS;
return -1;
#endif
#endif
+/* Realtime clock with microsecond resolution, falling back to less
+ precise functions if the target does not support gettimeofday().
+
+ Arguments:
+ secs - OUTPUT, seconds
+ usecs - OUTPUT, microseconds
+
+ The OUTPUT arguments shall represent the number of seconds and
+ nanoseconds since the Epoch.
+
+ Return value: 0 for success, -1 for error. In case of error, errno
+ is set.
+*/
+static inline int
+gf_gettime (time_t * secs, long * usecs)
+{
+#ifdef HAVE_GETTIMEOFDAY
+ struct timeval tv;
+ int err;
+ err = gettimeofday (&tv, NULL);
+ *secs = tv.tv_sec;
+ *usecs = tv.tv_usec;
+ return err;
+#elif HAVE_TIME
+ time_t t, t2;
+ t = time (&t2);
+ *secs = t2;
+ *usecs = 0;
+ if (t == ((time_t)-1))
+ return -1;
+ return 0;
+#else
+ *secs = 0;
+ *usecs = 0;
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+
#endif /* LIBGFORTRAN_TIME_H */
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