diff options
Diffstat (limited to 'src/os/os_pid.c')
-rw-r--r-- | src/os/os_pid.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/os/os_pid.c b/src/os/os_pid.c new file mode 100644 index 00000000..b1b94d60 --- /dev/null +++ b/src/os/os_pid.c @@ -0,0 +1,63 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 2001, 2012 Oracle and/or its affiliates. All rights reserved. + * + * $Id$ + */ + +#include "db_config.h" + +#include "db_int.h" + +/* + * __os_id -- + * Return the current process ID. + * + * PUBLIC: void __os_id __P((DB_ENV *, pid_t *, db_threadid_t*)); + */ +void +__os_id(dbenv, pidp, tidp) + DB_ENV *dbenv; + pid_t *pidp; + db_threadid_t *tidp; +{ + /* + * We can't depend on dbenv not being NULL, this routine is called + * from places where there's no DB_ENV handle. + * + * We cache the pid in the ENV handle, getting the process ID is a + * fairly slow call on lots of systems. + */ + if (pidp != NULL) { + if (dbenv == NULL) { +#if defined(HAVE_VXWORKS) + *pidp = taskIdSelf(); +#else + *pidp = getpid(); +#endif + } else + *pidp = dbenv->env->pid_cache; + } + +/* + * When building on MinGW, we define both HAVE_PTHREAD_SELF and DB_WIN32, + * and we are using pthreads instead of Windows threads implementation. + * So here, we need to check the thread implementations before checking + * the platform. + */ + if (tidp != NULL) { +#if defined(HAVE_PTHREAD_SELF) + *tidp = pthread_self(); +#elif defined(HAVE_MUTEX_UI_THREADS) + *tidp = thr_self(); +#elif defined(DB_WIN32) + *tidp = GetCurrentThreadId(); +#else + /* + * Default to just getpid. + */ + DB_THREADID_INIT(*tidp); +#endif + } +} |