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 Parameter: 19 . s - number of seconds to sleep 20 21 Level: intermediate 22 23 Note: 24 If `s` is negative waits for keyboard input 25 26 .seealso: `PetscTime()` 27 @*/ 28 PetscErrorCode PetscSleep(PetscReal s) 29 { 30 PetscFunctionBegin; 31 if (s < 0) getc(stdin); 32 33 /* Some systems consider it an error to call nanosleep or usleep for more than one second so we only use them for subsecond sleeps. */ 34 #if defined(PETSC_HAVE_NANOSLEEP) 35 else if (s < 1) { 36 struct timespec rq; 37 rq.tv_sec = 0; 38 rq.tv_nsec = (long)(s * 1e9); 39 nanosleep(&rq, NULL); 40 } 41 #elif defined(PETSC_HAVE_USLEEP) 42 /* POSIX.1-2001 deprecates this in favor of nanosleep because nanosleep defines interaction with signals */ 43 else if (s < 1) usleep((unsigned int)(s * 1e6)); 44 #endif 45 46 #if defined(PETSC_HAVE_SLEEP) 47 else 48 sleep((int)s); 49 #elif defined(PETSC_HAVE__SLEEP) && defined(PETSC_HAVE__SLEEP_MILISEC) 50 else _sleep((int)(s * 1000)); 51 #elif defined(PETSC_HAVE__SLEEP) 52 else _sleep((int)s); 53 #else 54 SETERRQ(PETSC_COMM_SELF, PETSC_ERR_SUP_SYS, "No support for sleep() on this machine"); 55 #endif 56 PetscFunctionReturn(PETSC_SUCCESS); 57 } 58