LLVM OpenMP* Runtime Library
kmp_wrapper_getpid.h
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 #if !defined(KMP_OS_AIX) && !defined(KMP_OS_HAIKU)
21 #include <sys/syscall.h>
22 #endif
23 #include <sys/types.h>
24 #include <unistd.h>
25 #if KMP_OS_DARWIN
26 // OS X
27 #define __kmp_gettid() pthread_mach_thread_np(pthread_self())
28 #elif KMP_OS_FREEBSD || KMP_OS_DRAGONFLY
29 #include <pthread_np.h>
30 #define __kmp_gettid() pthread_getthreadid_np()
31 #elif KMP_OS_NETBSD
32 #include <lwp.h>
33 #define __kmp_gettid() _lwp_self()
34 #elif KMP_OS_OPENBSD
35 #define __kmp_gettid() getthrid()
36 #elif KMP_OS_AIX
37 #include <pthread.h>
38 #define __kmp_gettid() pthread_self()
39 #elif KMP_OS_HAIKU
40 #include <OS.h>
41 #define __kmp_gettid() find_thread(NULL)
42 #elif defined(SYS_gettid)
43 // Hopefully other Unix systems define SYS_gettid syscall for getting os thread
44 // id
45 #define __kmp_gettid() syscall(SYS_gettid)
46 #else
47 #warning No gettid found, use getpid instead
48 #define __kmp_gettid() getpid()
49 #endif
50 
51 #elif KMP_OS_WINDOWS
52 
53 // On Windows* OS _getpid() returns int (not pid_t) and is declared in
54 // "process.h".
55 #include <process.h>
56 // Let us simulate Unix.
57 #if KMP_MSVC_COMPAT
58 typedef int pid_t;
59 #endif
60 #define getpid _getpid
61 #define __kmp_gettid() GetCurrentThreadId()
62 
63 #else
64 
65 #error Unknown or unsupported OS.
66 
67 #endif
68 
69 /* TODO: All the libomp source code uses pid_t type for storing the result of
70  getpid(), it is good. But often it printed as "%d", that is not good, because
71  it ignores pid_t definition (may pid_t be longer that int?). It seems all pid
72  prints should be rewritten as:
73 
74  printf( "%" KMP_UINT64_SPEC, (kmp_uint64) pid );
75 
76  or (at least) as
77 
78  printf( "%" KMP_UINT32_SPEC, (kmp_uint32) pid );
79 
80  (kmp_uint32, kmp_uint64, KMP_UINT64_SPEC, and KMP_UNIT32_SPEC are defined in
81  "kmp_os.h".) */
82 
83 #endif // KMP_WRAPPER_GETPID_H
84 
85 // end of file //