Cleanup: move unused function to deprecated symbol list

[lttng-ust.git] / liblttng-ust / compat.h

diff --git a/liblttng-ust/compat.h b/liblttng-ust/compat.h
index 8ee4470a0b381289986e48742274fa287d835e1a..003b480aa01d27dc428877dc9935963335e5340d 100644 (file)
--- a/liblttng-ust/compat.h
+++ b/liblttng-ust/compat.h
@@ -2,29 +2,135 @@
 #define _UST_COMPAT_H
 
 /*
- * Copyright (C) 2011   Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2016 Raphaël Beamonte <raphael.beamonte@gmail.com>
  *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
  *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/*
+ * lttng_ust_getprocname.
+ */
+#ifdef __linux__
+
+#include <sys/prctl.h>
+
+#define LTTNG_UST_PROCNAME_LEN 17
+
+static inline
+void lttng_ust_getprocname(char *name)
+{
+       (void) prctl(PR_GET_NAME, (unsigned long) name, 0, 0, 0);
+}
+
+/*
+ * If pthread_setname_np is available.
+ */
+#ifdef HAVE_PTHREAD_SETNAME_NP
+static inline
+int lttng_pthread_setname_np(pthread_t thread, const char *name)
+{
+       return pthread_setname_np(thread, name);
+}
+#endif
+
+#elif defined(__FreeBSD__)
+
+#include <stdlib.h>
+#include <string.h>
+
+/*
+ * Limit imposed by Linux UST-sessiond ABI.
+ */
+#define LTTNG_UST_PROCNAME_LEN 17
+
+/*
+ * Acts like linux prctl, the string is not necessarily 0-terminated if
+ * 16-byte long.
  */
+static inline
+void lttng_ust_getprocname(char *name)
+{
+       const char *bsd_name;
+
+       bsd_name = getprogname();
+       if (!bsd_name)
+               name[0] = '\0';
+       else
+               strncpy(name, bsd_name, LTTNG_UST_PROCNAME_LEN - 1);
+}
+
+/*
+ * If pthread_set_name_np is available.
+ */
+#ifdef HAVE_PTHREAD_SET_NAME_NP
+static inline
+int lttng_pthread_setname_np(pthread_t thread, const char *name)
+{
+       return pthread_set_name_np(thread, name);
+}
+#endif
+
+#endif
+
+/*
+ * If a pthread setname/set_name function is available, declare
+ * the setustprocname() function that will add '-ust' to the end
+ * of the current process name, while truncating it if needed.
+ */
+#if defined(HAVE_PTHREAD_SETNAME_NP) || defined(HAVE_PTHREAD_SETNAME_NP)
+#define LTTNG_UST_PROCNAME_SUFFIX "-ust"
 
-#include <sys/syscall.h>
+#include <pthread.h>
 
-#ifdef __UCLIBC__
-#define __getcpu(cpu, node, cache)     syscall(__NR_getcpu, cpu, node, cache)
 static inline
-int sched_getcpu(void)
+int lttng_ust_setustprocname(void)
 {
-       int c, s;
+       int ret = 0, len;
+       char name[LTTNG_UST_PROCNAME_LEN];
+       int limit = LTTNG_UST_PROCNAME_LEN - strlen(LTTNG_UST_PROCNAME_SUFFIX) - 1;
+
+       lttng_ust_getprocname(name);
+
+       len = strlen(name);
+       if (len > limit) {
+               len = limit;
+       }
+
+       ret = sprintf(name + len, LTTNG_UST_PROCNAME_SUFFIX);
+       if (ret != strlen(LTTNG_UST_PROCNAME_SUFFIX)) {
+               goto error;
+       }
+
+       ret = lttng_pthread_setname_np(pthread_self(), name);
 
-       s = __getcpu(&c, NULL, NULL);
-       return (s == -1) ? s : c;
+error:
+       return ret;
 }
-#endif /* __UCLIBC__ */
+#else
+static inline
+int lttng_ust_setustprocname(void)
+{
+       return 0;
+}
+#endif
+
+#include <errno.h>
+
+#ifndef ENODATA
+#define ENODATA        ENOMSG
+#endif
+
 #endif /* _UST_COMPAT_H */