src/common/compat/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 _UST_COMMON_COMPAT_GETTID_H
  10 #define _UST_COMMON_COMPAT_GETTID_H
  11
  12 #ifdef __linux__
  13 #include <sys/syscall.h>
  14 #endif
  15
  16 #ifdef HAVE_GETTID
  17
  18 #include <unistd.h>
  19 static inline pid_t lttng_gettid(void)
  20 {
  21         return gettid();
  22 }
  23
  24 #elif defined(__NR_gettid)
  25
  26 #include <unistd.h>
  27 static inline pid_t lttng_gettid(void)
  28 {
  29         return syscall(__NR_gettid);
  30 }
  31
  32 #else
  33
  34 #include <sys/types.h>
  35 #include <unistd.h>
  36
  37 /* Fall-back on getpid for tid if not available. */
  38 static inline pid_t lttng_gettid(void)
  39 {
  40         return getpid();
  41 }
  42
  43 #endif
  44
  45 #endif /* _UST_COMMON_COMPAT_GETTID_H */