10039db0dSBarry Smith #define PETSC_DESIRE_FEATURE_TEST_MACROS /* for usleep() */ 2c6db04a5SJed Brown #include <petscsys.h> /*I "petscsys.h" I*/ 3e5c89e4eSSatish Balay #if defined(PETSC_HAVE_UNISTD_H) 4e5c89e4eSSatish Balay #include <unistd.h> 5e5c89e4eSSatish Balay #endif 6e5c89e4eSSatish Balay #if defined(PETSC_HAVE_DOS_H) /* borland */ 7e5c89e4eSSatish Balay #include <dos.h> 8e5c89e4eSSatish Balay #endif 9a6d0e24fSJed Brown #if defined(PETSC_HAVE_TIME_H) 10a6d0e24fSJed Brown #include <time.h> 11a6d0e24fSJed Brown #endif 12e5c89e4eSSatish Balay 13e5c89e4eSSatish Balay /*@ 14e5c89e4eSSatish Balay PetscSleep - Sleeps some number of seconds. 15e5c89e4eSSatish Balay 16e5c89e4eSSatish Balay Not Collective 17e5c89e4eSSatish Balay 18e5c89e4eSSatish Balay Input Parameters: 19e5c89e4eSSatish Balay . s - number of seconds to sleep 20e5c89e4eSSatish Balay 21e5c89e4eSSatish Balay Notes: 22e5c89e4eSSatish Balay If s is negative waits for keyboard input 23e5c89e4eSSatish Balay 24e5c89e4eSSatish Balay Level: intermediate 25e5c89e4eSSatish Balay 26e5c89e4eSSatish Balay @*/ 27*9371c9d4SSatish Balay PetscErrorCode PetscSleep(PetscReal s) { 28e5c89e4eSSatish Balay PetscFunctionBegin; 29e5c89e4eSSatish Balay if (s < 0) getc(stdin); 30a6d0e24fSJed Brown 31a6d0e24fSJed Brown /* Some systems consider it an error to call nanosleep or usleep for more than one second so we only use them for subsecond sleeps. */ 32a6d0e24fSJed Brown #if defined(PETSC_HAVE_NANOSLEEP) 33a6d0e24fSJed Brown else if (s < 1) { 34a6d0e24fSJed Brown struct timespec rq; 35a6d0e24fSJed Brown rq.tv_sec = 0; 36a6d0e24fSJed Brown rq.tv_nsec = (long)(s * 1e9); 3702c9f0b5SLisandro Dalcin nanosleep(&rq, NULL); 38a6d0e24fSJed Brown } 39a6d0e24fSJed Brown #elif defined(PETSC_HAVE_USLEEP) 40a6d0e24fSJed Brown /* POSIX.1-2001 deprecates this in favor of nanosleep because nanosleep defines interaction with signals */ 41a6d0e24fSJed Brown else if (s < 1) usleep((unsigned int)(s * 1e6)); 42a6d0e24fSJed Brown #endif 43a6d0e24fSJed Brown 44e5c89e4eSSatish Balay #if defined(PETSC_HAVE_SLEEP) 45*9371c9d4SSatish Balay else 46*9371c9d4SSatish Balay sleep((int)s); 47e5c89e4eSSatish Balay #elif defined(PETSC_HAVE__SLEEP) && defined(PETSC_HAVE__SLEEP_MILISEC) 48a6d0e24fSJed Brown else _sleep((int)(s * 1000)); 49e5c89e4eSSatish Balay #elif defined(PETSC_HAVE__SLEEP) 50a6d0e24fSJed Brown else _sleep((int)s); 51e5c89e4eSSatish Balay #else 52fa6b8e38SSatish Balay SETERRQ(PETSC_COMM_SELF, PETSC_ERR_SUP_SYS, "No support for sleep() on this machine"); 53e5c89e4eSSatish Balay #endif 54e5c89e4eSSatish Balay PetscFunctionReturn(0); 55e5c89e4eSSatish Balay } 56