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