xref: /freebsd/contrib/llvm-project/openmp/runtime/src/kmp_wrapper_getpid.h (revision 7fdf597e96a02165cfe22ff357b857d5fa15ed8a)
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)
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 defined(SYS_gettid)
40 // Hopefully other Unix systems define SYS_gettid syscall for getting os thread
41 // id
42 #define __kmp_gettid() syscall(SYS_gettid)
43 #else
44 #warning No gettid found, use getpid instead
45 #define __kmp_gettid() getpid()
46 #endif
47 
48 #elif KMP_OS_WINDOWS
49 
50 // On Windows* OS _getpid() returns int (not pid_t) and is declared in
51 // "process.h".
52 #include <process.h>
53 // Let us simulate Unix.
54 #if KMP_MSVC_COMPAT
55 typedef int pid_t;
56 #endif
57 #define getpid _getpid
58 #define __kmp_gettid() GetCurrentThreadId()
59 
60 #else
61 
62 #error Unknown or unsupported OS.
63 
64 #endif
65 
66 /* TODO: All the libomp source code uses pid_t type for storing the result of
67    getpid(), it is good. But often it printed as "%d", that is not good, because
68    it ignores pid_t definition (may pid_t be longer that int?). It seems all pid
69    prints should be rewritten as:
70 
71    printf( "%" KMP_UINT64_SPEC, (kmp_uint64) pid );
72 
73    or (at least) as
74 
75    printf( "%" KMP_UINT32_SPEC, (kmp_uint32) pid );
76 
77    (kmp_uint32, kmp_uint64, KMP_UINT64_SPEC, and KMP_UNIT32_SPEC are defined in
78    "kmp_os.h".)  */
79 
80 #endif // KMP_WRAPPER_GETPID_H
81 
82 // end of file //
83