pike.git/ src/ configure.in

2003-02-11

2003-02-11 20:03:41 by Martin Stjernholm <mast@lysator.liu.se>

• 025dd33bc6831ee720413fcdaf468915dd523bf3 (48 lines) (+41/-7) ^{[ Show | Annotate ]}
  Branch: 7.9

Only use gethrvtime if it works reliably.

Rev: src/acconfig.h:1.116
Rev: src/configure.in:1.687
Rev: src/rusage.c:1.34

1: - AC_REVISION("$Id: configure.in,v 1.686 2003/02/11 19:27:19 mast Exp $") + AC_REVISION("$Id: configure.in,v 1.687 2003/02/11 20:03:41 mast Exp $")   AC_INIT(interpret.c)   AC_CONFIG_HEADER(machine.h)   
3491:      AC_MSG_RESULT($pike_cv_func_gettimeofday_has_two_args)    + if test "x$ac_cv_func_gethrvtime" = xyes; then +  AC_MSG_CHECKING(if gethrvtime really works) +  AC_CACHE_VAL(pike_cv_func_gethrvtime_works, [ +  AC_TRY_RUN([ + #define CONFIGURE_TEST +  + #include "port.c" +  + int main() + { +  time_t start = TIME (0), now; +  hrtime_t vt = gethrvtime(), next_vt; +  if (start == (time_t) -1) return 1; /* Normal time doesn't work. */ +  do { /* Take some cpu time. */ +  now = TIME (0); +  next_vt = gethrvtime(); +  if (next_vt < vt) return 2; /* Shouldn't go backward. */ +  vt = next_vt; +  } while (now != (time_t) -1 && now < start + 1); +  if (now == (time_t) -1) return 3; /* Normal time doesn't work. */ +  if (vt <= 0) return 4; /* Should have accounted for some cpu time. */ +  return 0; + } +  ], pike_cv_func_gethrvtime_works=yes, +  pike_cv_func_gethrvtime_works=no, +  pike_cv_func_gethrvtime_works=no) +  ]) +  AC_MSG_RESULT($pike_cv_func_gethrvtime_works) +  if test "x$pike_cv_func_gethrvtime_works" = xyes; then +  AC_DEFINE(HAVE_WORKING_GETHRVTIME) +  fi + fi +    # if test "x$ac_cv_func_gethrtime" != "xyes"; then   # AC_MSG_CHECKING(if we can make gethrtime by the RDTSC instruction)   # AC_CACHE_VAL(pike_cv_own_gethrtime_rdtsc, [
5726:      AC_MSG_CHECKING(if cpu time is thread local)   AC_CACHE_VAL(pike_cv_thread_local_cpu_time, [ -  rm -f conftest.out.2 2>/dev/null +  rm -f confdefs.out.2 2>/dev/null    AC_TRY_RUN([   #include <stdio.h>   
5767:   {    cpu_time_t start;    THREAD_T worker; -  FILE *res = fopen ("conftest.out.2", "w"); +  FILE *res = fopen ("confdefs.out.2", "w"); /* weird name to circumvent configure cleanups */    if (!res) return 2;       really_low_th_init();
5809:   #else   int main()   { -  FILE *res = fopen ("conftest.out.2", "w"); +  FILE *res = fopen ("confdefs.out.2", "w"); /* weird name to circumvent configure cleanups */    if (!res) return 6;    fputs ("no", res);    fclose (res);
5819:    ], [    pike_cv_thread_local_cpu_time=yes    ], [ -  if test -f conftest.out.2; then -  pike_cv_thread_local_cpu_time=`cat conftest.out.2` -  rm -f conftest.out.2 2>/dev/null +  if test -f confdefs.out.2; then +  pike_cv_thread_local_cpu_time=`cat confdefs.out.2`    else    AC_MSG_WARN([   Test failed to compile.
5832:    ], [    pike_cv_thread_local_cpu_time="unknown (cross compilation)"    ]) +  rm -f confdefs.out.2 2>/dev/null   ])   AC_MSG_RESULT($pike_cv_thread_local_cpu_time)   if test "$pike_cv_thread_local_cpu_time" = yes; then