LLVM OpenMP* Runtime Library
kmp_wrapper_getpid.h
1 /*
2  * kmp_wrapper_getpid.h -- getpid() declaration.
3  */
4 
5 
6 //===----------------------------------------------------------------------===//
7 //
8 // The LLVM Compiler Infrastructure
9 //
10 // This file is dual licensed under the MIT and the University of Illinois Open
11 // Source Licenses. See LICENSE.txt for details.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 
16 #ifndef KMP_WRAPPER_GETPID_H
17 #define KMP_WRAPPER_GETPID_H
18 
19 #if KMP_OS_UNIX
20 
21 // On Unix-like systems (Linux* OS and OS X*) getpid() is declared in standard
22 // headers.
23 #include <sys/syscall.h>
24 #include <sys/types.h>
25 #include <unistd.h>
26 #if KMP_OS_DARWIN
27 // OS X
28 #define __kmp_gettid() syscall(SYS_thread_selfid)
29 #elif defined(SYS_gettid)
30 // Hopefully other Unix systems define SYS_gettid syscall for getting os thread
31 // id
32 #define __kmp_gettid() syscall(SYS_gettid)
33 #else
34 #warning No gettid found, use getpid instead
35 #define __kmp_gettid() getpid()
36 #endif
37 
38 #elif KMP_OS_WINDOWS
39 
40 // On Windows* OS _getpid() returns int (not pid_t) and is declared in
41 // "process.h".
42 #include <process.h>
43 // Let us simulate Unix.
44 typedef int pid_t;
45 #define getpid _getpid
46 #define __kmp_gettid() GetCurrentThreadId()
47 
48 #else
49 
50 #error Unknown or unsupported OS.
51 
52 #endif
53 
54 /* TODO: All the libomp source code uses pid_t type for storing the result of
55  getpid(), it is good. But often it printed as "%d", that is not good, because
56  it ignores pid_t definition (may pid_t be longer that int?). It seems all pid
57  prints should be rewritten as:
58 
59  printf( "%" KMP_UINT64_SPEC, (kmp_uint64) pid );
60 
61  or (at least) as
62 
63  printf( "%" KMP_UINT32_SPEC, (kmp_uint32) pid );
64 
65  (kmp_uint32, kmp_uint64, KMP_UINT64_SPEC, and KMP_UNIT32_SPEC are defined in
66  "kmp_os.h".) */
67 
68 #endif // KMP_WRAPPER_GETPID_H
69 
70 // end of file //