00001 /*- 00002 * See the file LICENSE for redistribution information. 00003 * 00004 * Copyright (c) 1997, 1998, 1999, 2000 00005 * Sleepycat Software. All rights reserved. 00006 */ 00007 00008 #include "config.h" 00009 00010 #ifndef lint 00011 static const char revid[] = "$Id: os__sleep_8c-source.html,v 1.1 2008年06月08日 10:21:31 sebdiaz Exp $"; 00012 #endif /* not lint */ 00013 00014 #ifndef NO_SYSTEM_INCLUDES 00015 #include <sys/types.h> 00016 00017 #ifdef HAVE_SYS_SELECT_H 00018 #include <sys/select.h> 00019 #endif 00020 00021 #ifdef HAVE_VXWORKS 00022 #include <sys/times.h> 00023 #include <time.h> 00024 #else 00025 #if TIME_WITH_SYS_TIME 00026 #include <sys/time.h> 00027 #include <time.h> 00028 #else 00029 #if HAVE_SYS_TIME_H 00030 #include <sys/time.h> 00031 #else 00032 #include <time.h> 00033 #endif /* HAVE_SYS_TIME_H */ 00034 #endif /* TIME_WITH SYS_TIME */ 00035 #endif /* HAVE_VXWORKS */ 00036 00037 #include <string.h> 00038 #include <unistd.h> 00039 #endif 00040 00041 #include "db_int.h" 00042 #include "os_jump.h" 00043 00044 /* 00045 * CDB___os_sleep -- 00046 * Yield the processor for a period of time. 00047 * 00048 * PUBLIC: int CDB___os_sleep __P((DB_ENV *, u_long, u_long)); 00049 */ 00050 int 00051 CDB___os_sleep(dbenv, secs, usecs) 00052 DB_ENV *dbenv; 00053 u_long secs, usecs; /* Seconds and microseconds. */ 00054 { 00055 struct timeval t; 00056 int ret; 00057 00058 /* Don't require that the values be normalized. */ 00059 for (; usecs >= 1000000; usecs -= 1000000) 00060 ++secs; 00061 00062 if (CDB___db_jump.j_sleep != NULL) 00063 return (CDB___db_jump.j_sleep(secs, usecs)); 00064 00065 /* 00066 * It's important that we yield the processor here so that other 00067 * processes or threads are permitted to run. 00068 */ 00069 t.tv_sec = secs; 00070 t.tv_usec = usecs; 00071 ret = select(0, NULL, NULL, NULL, &t) == -1 ? CDB___os_get_errno() : 0; 00072 00073 if (ret != 0) 00074 CDB___db_err(dbenv, "select: %s", strerror(ret)); 00075 00076 return (ret); 00077 }