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150
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1 /*
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2 * kmp_wrapper_getpid.h -- getpid() declaration.
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3 */
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4
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5 //===----------------------------------------------------------------------===//
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6 //
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7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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8 // See https://llvm.org/LICENSE.txt for license information.
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9 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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10 //
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11 //===----------------------------------------------------------------------===//
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12
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13 #ifndef KMP_WRAPPER_GETPID_H
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14 #define KMP_WRAPPER_GETPID_H
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15
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16 #if KMP_OS_UNIX
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17
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18 // On Unix-like systems (Linux* OS and OS X*) getpid() is declared in standard
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19 // headers.
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20 #include <sys/syscall.h>
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21 #include <sys/types.h>
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22 #include <unistd.h>
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23 #if KMP_OS_DARWIN
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24 // OS X
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25 #define __kmp_gettid() syscall(SYS_thread_selfid)
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26 #elif KMP_OS_FREEBSD
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27 #include <pthread_np.h>
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28 #define __kmp_gettid() pthread_getthreadid_np()
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29 #elif KMP_OS_NETBSD
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30 #include <lwp.h>
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31 #define __kmp_gettid() _lwp_self()
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32 #elif KMP_OS_OPENBSD
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33 #define __kmp_gettid() syscall(SYS_getthrid)
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34 #elif defined(SYS_gettid)
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35 // Hopefully other Unix systems define SYS_gettid syscall for getting os thread
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36 // id
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37 #define __kmp_gettid() syscall(SYS_gettid)
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38 #else
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39 #warning No gettid found, use getpid instead
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40 #define __kmp_gettid() getpid()
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41 #endif
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42
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43 #elif KMP_OS_WINDOWS
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44
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45 // On Windows* OS _getpid() returns int (not pid_t) and is declared in
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46 // "process.h".
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47 #include <process.h>
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48 // Let us simulate Unix.
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49 #if KMP_MSVC_COMPAT
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50 typedef int pid_t;
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51 #endif
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52 #define getpid _getpid
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53 #define __kmp_gettid() GetCurrentThreadId()
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54
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55 #else
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56
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57 #error Unknown or unsupported OS.
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58
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59 #endif
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60
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61 /* TODO: All the libomp source code uses pid_t type for storing the result of
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62 getpid(), it is good. But often it printed as "%d", that is not good, because
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63 it ignores pid_t definition (may pid_t be longer that int?). It seems all pid
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64 prints should be rewritten as:
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65
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66 printf( "%" KMP_UINT64_SPEC, (kmp_uint64) pid );
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67
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68 or (at least) as
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69
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70 printf( "%" KMP_UINT32_SPEC, (kmp_uint32) pid );
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71
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72 (kmp_uint32, kmp_uint64, KMP_UINT64_SPEC, and KMP_UNIT32_SPEC are defined in
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73 "kmp_os.h".) */
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74
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75 #endif // KMP_WRAPPER_GETPID_H
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76
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77 // end of file //
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