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() pthread_mach_thread_np(pthread_self())
26 #elif KMP_OS_FREEBSD || KMP_OS_DRAGONFLY
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() 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
50 typedef 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