/* Implementation of the SYSTEM_CLOCK intrinsic.
- Copyright (C) 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2007, 2009 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
License as published by the Free Software Foundation; either
-version 2 of the License, or (at your option) any later version.
-
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file. (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
+version 3 of the License, or (at your option) any later version.
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-You should have received a copy of the GNU General Public
-License along with libgfortran; see the file COPYING. If not,
-write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
-#include "config.h"
-#include <sys/types.h>
#include "libgfortran.h"
#include <limits.h>
#if defined(HAVE_SYS_TIME_H) && defined(HAVE_GETTIMEOFDAY)
# include <sys/time.h>
-# define TCK 1000
#elif defined(HAVE_TIME_H)
# include <time.h>
# define TCK 1
#endif
-#if defined(HAVE_SYS_TIME_H) && defined(HAVE_GETTIMEOFDAY)
-static struct timeval tp0 = {-1, 0};
-#elif defined(HAVE_TIME_H)
-static time_t t0 = (time_t) -2;
-#endif
-
-
extern void system_clock_4 (GFC_INTEGER_4 *, GFC_INTEGER_4 *, GFC_INTEGER_4 *);
export_proto(system_clock_4);
GFC_INTEGER_4 *count_max)
{
GFC_INTEGER_4 cnt;
- GFC_INTEGER_4 rate;
GFC_INTEGER_4 mx;
#if defined(HAVE_SYS_TIME_H) && defined(HAVE_GETTIMEOFDAY)
+#define TCK 1000
struct timeval tp1;
- struct timezone tzp;
- double t;
- if (gettimeofday(&tp1, &tzp) == 0)
+ if (sizeof (tp1.tv_sec) < sizeof (GFC_INTEGER_4))
+ internal_error (NULL, "tv_sec too small");
+
+ if (gettimeofday(&tp1, NULL) == 0)
{
- if (tp0.tv_sec < 0)
- {
- tp0 = tp1;
- cnt = 0;
- }
+ GFC_UINTEGER_4 ucnt = (GFC_UINTEGER_4) tp1.tv_sec * TCK;
+ ucnt += (tp1.tv_usec + 500000 / TCK) / (1000000 / TCK);
+ if (ucnt > GFC_INTEGER_4_HUGE)
+ cnt = ucnt - GFC_INTEGER_4_HUGE - 1;
else
- {
- /* TODO: Convert this to integer arithmetic. */
- t = (double) (tp1.tv_sec - tp0.tv_sec);
- t += (double) (tp1.tv_usec - tp0.tv_usec) * 1.e-6;
- t *= TCK;
-
- if (t > (double) GFC_INTEGER_4_HUGE)
- {
- /* Time has wrapped. */
- while (t > (double) GFC_INTEGER_4_HUGE)
- t -= (double) GFC_INTEGER_4_HUGE;
- tp0 = tp1;
- }
- cnt = (GFC_INTEGER_4) t;
- }
- rate = TCK;
+ cnt = ucnt;
mx = GFC_INTEGER_4_HUGE;
}
else
{
- if (count != NULL) *count = - GFC_INTEGER_4_HUGE;
- if (count_rate != NULL) *count_rate = 0;
- if (count_max != NULL) *count_max = 0;
+ if (count != NULL)
+ *count = - GFC_INTEGER_4_HUGE;
+ if (count_rate != NULL)
+ *count_rate = 0;
+ if (count_max != NULL)
+ *count_max = 0;
+ return;
}
#elif defined(HAVE_TIME_H)
- time_t t, t1;
+ GFC_UINTEGER_4 ucnt;
- t1 = time(NULL);
+ if (sizeof (time_t) < sizeof (GFC_INTEGER_4))
+ internal_error (NULL, "time_t too small");
- if (t1 == (time_t) -1)
- {
- cnt = - GFC_INTEGER_4_HUGE;
- mx = 0;
- }
- else if (t0 == (time_t) -2)
- t0 = t1;
+ ucnt = time (NULL);
+ if (ucnt > GFC_INTEGER_4_HUGE)
+ cnt = ucnt - GFC_INTEGER_4_HUGE - 1;
else
- {
- /* The timer counts in seconts, so for simplicity assume it never wraps.
- Even with 32-bit counters this only happens once every 68 years. */
- cnt = t1 - t0;
- mx = GFC_INTEGER_4_HUGE;
- }
+ cnt = ucnt;
+ mx = GFC_INTEGER_4_HUGE;
#else
cnt = - GFC_INTEGER_4_HUGE;
mx = 0;
#endif
- if (count != NULL) *count = cnt;
- if (count_rate != NULL) *count_rate = TCK;
- if (count_max != NULL) *count_max = mx;
+ if (count != NULL)
+ *count = cnt;
+ if (count_rate != NULL)
+ *count_rate = TCK;
+ if (count_max != NULL)
+ *count_max = mx;
}
void
system_clock_8 (GFC_INTEGER_8 *count, GFC_INTEGER_8 *count_rate,
- GFC_INTEGER_8 *count_max)
+ GFC_INTEGER_8 *count_max)
{
GFC_INTEGER_8 cnt;
- GFC_INTEGER_8 rate;
GFC_INTEGER_8 mx;
#if defined(HAVE_SYS_TIME_H) && defined(HAVE_GETTIMEOFDAY)
+#define TCK 1000000
struct timeval tp1;
- struct timezone tzp;
- double t;
- if (gettimeofday(&tp1, &tzp) == 0)
+ if (sizeof (tp1.tv_sec) < sizeof (GFC_INTEGER_4))
+ internal_error (NULL, "tv_sec too small");
+
+ if (gettimeofday(&tp1, NULL) == 0)
{
- if (tp0.tv_sec < 0)
- {
- tp0 = tp1;
- cnt = 0;
- }
+ if (sizeof (tp1.tv_sec) < sizeof (GFC_INTEGER_8))
+ {
+ GFC_UINTEGER_4 ucnt = (GFC_UINTEGER_4) tp1.tv_sec * TCK;
+ ucnt += (tp1.tv_usec + 500000 / TCK) / (1000000 / TCK);
+ if (ucnt > GFC_INTEGER_4_HUGE)
+ cnt = ucnt - GFC_INTEGER_4_HUGE - 1;
+ else
+ cnt = ucnt;
+ mx = GFC_INTEGER_4_HUGE;
+ }
else
- {
- /* TODO: Convert this to integer arithmetic. */
- t = (double) (tp1.tv_sec - tp0.tv_sec);
- t += (double) (tp1.tv_usec - tp0.tv_usec) * 1.e-6;
- t *= TCK;
-
- if (t > (double) GFC_INTEGER_8_HUGE)
- {
- /* Time has wrapped. */
- while (t > (double) GFC_INTEGER_8_HUGE)
- t -= (double) GFC_INTEGER_8_HUGE;
- tp0 = tp1;
- }
- cnt = (GFC_INTEGER_8) t;
- }
- rate = TCK;
- mx = GFC_INTEGER_8_HUGE;
+ {
+ GFC_UINTEGER_8 ucnt = (GFC_UINTEGER_8) tp1.tv_sec * TCK;
+ ucnt += (tp1.tv_usec + 500000 / TCK) / (1000000 / TCK);
+ if (ucnt > GFC_INTEGER_8_HUGE)
+ cnt = ucnt - GFC_INTEGER_8_HUGE - 1;
+ else
+ cnt = ucnt;
+ mx = GFC_INTEGER_8_HUGE;
+ }
}
else
{
- if (count != NULL) *count = - GFC_INTEGER_8_HUGE;
- if (count_rate != NULL) *count_rate = 0;
- if (count_max != NULL) *count_max = 0;
+ if (count != NULL)
+ *count = - GFC_INTEGER_8_HUGE;
+ if (count_rate != NULL)
+ *count_rate = 0;
+ if (count_max != NULL)
+ *count_max = 0;
+
+ return;
}
#elif defined(HAVE_TIME_H)
- time_t t, t1;
-
- t1 = time(NULL);
-
- if (t1 == (time_t) -1)
+ if (sizeof (time_t) < sizeof (GFC_INTEGER_4))
+ internal_error (NULL, "time_t too small");
+ else if (sizeof (time_t) == sizeof (GFC_INTEGER_4))
{
- cnt = - GFC_INTEGER_8_HUGE;
- mx = 0;
+ GFC_UINTEGER_4 ucnt = time (NULL);
+ if (ucnt > GFC_INTEGER_4_HUGE)
+ cnt = ucnt - GFC_INTEGER_4_HUGE - 1;
+ else
+ cnt = ucnt;
+ mx = GFC_INTEGER_4_HUGE;
}
- else if (t0 == (time_t) -2)
- t0 = t1;
else
{
- /* The timer counts in seconts, so for simplicity assume it never wraps.
- Even with 32-bit counters this only happens once every 68 years. */
- cnt = t1 - t0;
+ GFC_UINTEGER_8 ucnt = time (NULL);
+ if (ucnt > GFC_INTEGER_8_HUGE)
+ cnt = ucnt - GFC_INTEGER_8_HUGE - 1;
+ else
+ cnt = ucnt;
mx = GFC_INTEGER_8_HUGE;
}
#else
OSDN Git Service
