kmp_wrapper_getpid.h revision 360784 
1/*
2 * kmp_wrapper_getpid.h -- getpid() declaration.
3 */
4
5//===----------------------------------------------------------------------===//
6//
7// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
8// See https://llvm.org/LICENSE.txt for license information.
9// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef KMP_WRAPPER_GETPID_H
14#define KMP_WRAPPER_GETPID_H
15
16#if KMP_OS_UNIX
17
18// On Unix-like systems (Linux* OS and OS X*) getpid() is declared in standard
19// headers.
20#include <sys/syscall.h>
21#include <sys/types.h>
22#include <unistd.h>
23#if KMP_OS_DARWIN
24// OS X
25#define __kmp_gettid() syscall(SYS_thread_selfid)
26#elif KMP_OS_FREEBSD
27#include <pthread_np.h>
28#define __kmp_gettid() pthread_getthreadid_np()
29#elif KMP_OS_NETBSD
30#include <lwp.h>
31#define __kmp_gettid() _lwp_self()
32#elif KMP_OS_OPENBSD
33#define __kmp_gettid() syscall(SYS_getthrid)
34#elif defined(SYS_gettid)
35// Hopefully other Unix systems define SYS_gettid syscall for getting os thread
36// id
37#define __kmp_gettid() syscall(SYS_gettid)
38#else
39#warning No gettid found, use getpid instead
40#define __kmp_gettid() getpid()
41#endif
42
43#elif KMP_OS_WINDOWS
44
45// On Windows* OS _getpid() returns int (not pid_t) and is declared in
46// "process.h".
47#include <process.h>
48// Let us simulate Unix.
49#if KMP_MSVC_COMPAT
50typedef int pid_t;
51#endif
52#define getpid _getpid
53#define __kmp_gettid() GetCurrentThreadId()
54
55#else
56
57#error Unknown or unsupported OS.
58
59#endif
60
61/* TODO: All the libomp source code uses pid_t type for storing the result of
62   getpid(), it is good. But often it printed as "%d", that is not good, because
63   it ignores pid_t definition (may pid_t be longer that int?). It seems all pid
64   prints should be rewritten as:
65
66   printf( "%" KMP_UINT64_SPEC, (kmp_uint64) pid );
67
68   or (at least) as
69
70   printf( "%" KMP_UINT32_SPEC, (kmp_uint32) pid );
71
72   (kmp_uint32, kmp_uint64, KMP_UINT64_SPEC, and KMP_UNIT32_SPEC are defined in
73   "kmp_os.h".)  */
74
75#endif // KMP_WRAPPER_GETPID_H
76
77// end of file //
78