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      1 // SPDX-FileCopyrightText: 2013 Mathieu Desnoyers <mathieu.desnoyers (at) efficios.com>
      2 //
      3 // SPDX-License-Identifier: LicenseRef-Boehm-GC
      4 
      5 #ifndef _TEST_THREAD_ID_H
      6 #define _TEST_THREAD_ID_H
      7 
      8 /*
      9  * Userspace RCU library - thread ID
     10  */
     11 
     12 #ifdef __linux__
     13 # include <urcu/syscall-compat.h>
     14 
     15 # if defined(HAVE_GETTID)
     16 /*
     17  * Do not redefine gettid() as it is already included
     18  * in bionic through <unistd.h>. Some other libc
     19  * may also already contain an implementation of gettid.
     20  */
     21 # elif defined(_syscall0)
     22 _syscall0(pid_t, gettid)
     23 # elif defined(__NR_gettid)
     24 static inline pid_t gettid(void)
     25 {
     26 	return syscall(__NR_gettid);
     27 }
     28 # endif
     29 
     30 static inline
     31 unsigned long urcu_get_thread_id(void)
     32 {
     33 	return (unsigned long) gettid();
     34 }
     35 #elif defined(__FreeBSD__)
     36 # include <pthread_np.h>
     37 
     38 static inline
     39 unsigned long urcu_get_thread_id(void)
     40 {
     41 	return (unsigned long) pthread_getthreadid_np();
     42 }
     43 #elif defined(__sun__) || defined(__APPLE__)
     44 #include <pthread.h>
     45 
     46 static inline
     47 unsigned long urcu_get_thread_id(void)
     48 {
     49 	return (unsigned long) pthread_self();
     50 }
     51 #elif defined(__CYGWIN__)
     52 #include <pthread.h>
     53 
     54 extern unsigned long pthread_getsequence_np(pthread_t *);
     55 
     56 static inline
     57 unsigned long urcu_get_thread_id(void)
     58 {
     59 	pthread_t thr = pthread_self();
     60 	return pthread_getsequence_np(&thr);
     61 }
     62 #elif defined(__OpenBSD__)
     63 #include <unistd.h>
     64 
     65 static inline
     66 unsigned long urcu_get_thread_id(void)
     67 {
     68 	return (unsigned long) getthrid();
     69 }
     70 #elif defined(__NetBSD__)
     71 #include <lwp.h>
     72 
     73 static inline
     74 unsigned long urcu_get_thread_id(void)
     75 {
     76 	return (unsigned long) _lwp_self();
     77 }
     78 #else
     79 # warning "use pid as thread ID"
     80 static inline
     81 unsigned long urcu_get_thread_id(void)
     82 {
     83 	return (unsigned long) getpid();
     84 }
     85 #endif
     86 
     87 #endif /* _TEST_THREAD_ID_H */
     88