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 Concepts: sleeping 27 Concepts: pause 28 Concepts: waiting 29 30 @*/ 31 PetscErrorCode PetscSleep(PetscReal s) 32 { 33 PetscFunctionBegin; 34 if (s < 0) getc(stdin); 35 36 /* Some systems consider it an error to call nanosleep or usleep for more than one second so we only use them for subsecond sleeps. */ 37 #if defined(PETSC_HAVE_NANOSLEEP) 38 else if (s < 1) { 39 struct timespec rq; 40 rq.tv_sec = 0; 41 rq.tv_nsec = (long)(s*1e9); 42 nanosleep(&rq,0); 43 } 44 #elif defined(PETSC_HAVE_USLEEP) 45 /* POSIX.1-2001 deprecates this in favor of nanosleep because nanosleep defines interaction with signals */ 46 else if (s < 1) usleep((unsigned int)(s*1e6)); 47 #endif 48 49 #if defined(PETSC_HAVE_SLEEP) 50 else sleep((int)s); 51 #elif defined(PETSC_HAVE__SLEEP) && defined(PETSC_HAVE__SLEEP_MILISEC) 52 else _sleep((int)(s*1000)); 53 #elif defined(PETSC_HAVE__SLEEP) 54 else _sleep((int)s); 55 #else 56 SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP_SYS,"No support for sleep() on this machine"); 57 #endif 58 PetscFunctionReturn(0); 59 } 60 61