include/lttng/ust-tid.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (C) 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * gettid compatibility layer.
   7  */
   8
   9 #ifndef _LTTNG_UST_TID_H
  10 #define _LTTNG_UST_TID_H
  11
  12 #ifdef __linux__
  13 #include <sys/syscall.h>
  14 #endif
  15
  16 #if defined(__NR_gettid)
  17
  18 #include <unistd.h>
  19 static inline pid_t lttng_gettid(void)
  20 {
  21         return syscall(__NR_gettid);
  22 }
  23
  24 #else
  25
  26 #include <sys/types.h>
  27 #include <unistd.h>
  28
  29 /* Fall-back on getpid for tid if not available. */
  30 static inline pid_t lttng_gettid(void)
  31 {
  32         return getpid();
  33 }
  34
  35 #endif
  36
  37 #endif /* _LTTNG_UST_TID_H */