liblttng-ust/compat.h

   1 #ifndef _UST_COMPAT_H
   2 #define _UST_COMPAT_H
   3
   4 /*
   5  * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  * Copyright (C) 2016 Raphaël Beamonte <raphael.beamonte@gmail.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; only
  11  * version 2.1 of the License.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <pthread.h>
  24
  25 /*
  26  * Limit imposed by Linux UST-sessiond ABI.
  27  */
  28 #define LTTNG_UST_PROCNAME_LEN 17
  29
  30 #define LTTNG_UST_PROCNAME_SUFFIX "-ust"
  31
  32
  33 #if defined(HAVE_PTHREAD_SETNAME_NP_WITH_TID)
  34 static inline
  35 int lttng_pthread_setname_np(const char *name)
  36 {
  37         return pthread_setname_np(pthread_self(), name);
  38 }
  39
  40 static inline
  41 int lttng_pthread_getname_np(char *name, size_t len)
  42 {
  43         return pthread_getname_np(pthread_self(), name, len);
  44 }
  45 #elif defined(HAVE_PTHREAD_SETNAME_NP_WITHOUT_TID)
  46 static inline
  47 int lttng_pthread_setname_np(const char *name)
  48 {
  49         return pthread_setname_np(name);
  50 }
  51
  52 static inline
  53 int lttng_pthread_getname_np(char *name, size_t len)
  54 {
  55         return pthread_getname_np(name, len);
  56 }
  57 #else
  58 /*
  59  * For platforms without thread name support, do nothing.
  60  */
  61 static inline
  62 int lttng_pthread_setname_np(const char *name)
  63 {
  64         return -ENOSYS;
  65 }
  66
  67 static inline
  68 int lttng_pthread_getname_np(char *name, size_t len)
  69 {
  70         return -ENOSYS;
  71 }
  72 #endif
  73
  74 static inline
  75 void lttng_ust_getprocname(char *name)
  76 {
  77         lttng_pthread_getname_np(name, LTTNG_UST_PROCNAME_LEN);
  78 }
  79
  80 static inline
  81 int lttng_ust_setustprocname(void)
  82 {
  83         int ret = 0, len;
  84         char name[LTTNG_UST_PROCNAME_LEN];
  85         int limit = LTTNG_UST_PROCNAME_LEN - strlen(LTTNG_UST_PROCNAME_SUFFIX) - 1;
  86
  87         lttng_pthread_getname_np(name, LTTNG_UST_PROCNAME_LEN);
  88
  89         len = strlen(name);
  90         if (len > limit) {
  91                 len = limit;
  92         }
  93
  94         ret = sprintf(name + len, LTTNG_UST_PROCNAME_SUFFIX);
  95         if (ret != strlen(LTTNG_UST_PROCNAME_SUFFIX)) {
  96                 goto error;
  97         }
  98
  99         ret = lttng_pthread_setname_np(name);
 100
 101 error:
 102         return ret;
 103 }
 104
 105
 106 #include <errno.h>
 107
 108 #ifndef ENODATA
 109 #define ENODATA ENOMSG
 110 #endif
 111
 112 #endif /* _UST_COMPAT_H */