1 #define PETSC_DESIRE_FEATURE_TEST_MACROS /* for usleep() */ 2 #include <petscsys.h> /*I "petscsys.h" I*/ 3 #if defined(PETSC_HAVE_UNISTD_H) 4 #include <unistd.h> 5 #endif 6 #if defined(PETSC_HAVE_DOS_H) /* borland */ 7 #include <dos.h> 8 #endif 9 #if defined(PETSC_HAVE_TIME_H) 10 #include <time.h> 11 #endif 12 13 /*@ 14 PetscSleep - Sleeps some number of seconds. 15 16 Not Collective 17 18 Input Parameters: 19 . s - number of seconds to sleep 20 21 Notes: 22 If s is negative waits for keyboard input 23 24 Level: intermediate 25 26 @*/ 27 PetscErrorCode PetscSleep(PetscReal s) { 28 PetscFunctionBegin; 29 if (s < 0) getc(stdin); 30 31 /* Some systems consider it an error to call nanosleep or usleep for more than one second so we only use them for subsecond sleeps. */ 32 #if defined(PETSC_HAVE_NANOSLEEP) 33 else if (s < 1) { 34 struct timespec rq; 35 rq.tv_sec = 0; 36 rq.tv_nsec = (long)(s * 1e9); 37 nanosleep(&rq, NULL); 38 } 39 #elif defined(PETSC_HAVE_USLEEP) 40 /* POSIX.1-2001 deprecates this in favor of nanosleep because nanosleep defines interaction with signals */ 41 else if (s < 1) usleep((unsigned int)(s * 1e6)); 42 #endif 43 44 #if defined(PETSC_HAVE_SLEEP) 45 else 46 sleep((int)s); 47 #elif defined(PETSC_HAVE__SLEEP) && defined(PETSC_HAVE__SLEEP_MILISEC) 48 else _sleep((int)(s * 1000)); 49 #elif defined(PETSC_HAVE__SLEEP) 50 else _sleep((int)s); 51 #else 52 SETERRQ(PETSC_COMM_SELF, PETSC_ERR_SUP_SYS, "No support for sleep() on this machine"); 53 #endif 54 PetscFunctionReturn(0); 55 } 56