Move all sources to 'src/'

[lttng-ust.git] / libringbuffer / getcpu.h

diff --git a/libringbuffer/getcpu.h b/libringbuffer/getcpu.h
deleted file mode 100644 (file)
index 52c7441..0000000
--- a/libringbuffer/getcpu.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#ifndef _LTTNG_GETCPU_H
-#define _LTTNG_GETCPU_H
-
-#include <urcu/compiler.h>
-#include <urcu/system.h>
-#include <urcu/arch.h>
-
-void lttng_ust_getcpu_init(void)
-       __attribute__((visibility("hidden")));
-
-extern int (*lttng_get_cpu)(void)
-       __attribute__((visibility("hidden")));
-
-#ifdef LTTNG_UST_DEBUG_VALGRIND
-
-/*
- * Fallback on cpu 0 if liblttng-ust is build with Valgrind support.
- * get_cpu() returns the current CPU number. It may change due to
- * migration, so it is only statistically accurate.
- */
-static inline
-int lttng_ust_get_cpu_internal(void)
-{
-       return 0;
-}
-
-#else
-
-/*
- * sched_getcpu.
- */
-#ifdef __linux__
-
-#if !HAVE_SCHED_GETCPU
-#include <sys/syscall.h>
-#define __getcpu(cpu, node, cache)     syscall(__NR_getcpu, cpu, node, cache)
-/*
- * If getcpu is not implemented in the kernel, use cpu 0 as fallback.
- */
-static inline
-int lttng_ust_get_cpu_internal(void)
-{
-       int cpu, ret;
-
-       ret = __getcpu(&cpu, NULL, NULL);
-       if (caa_unlikely(ret < 0))
-               return 0;
-       return cpu;
-}
-#else /* HAVE_SCHED_GETCPU */
-#include <sched.h>
-
-/*
- * If getcpu is not implemented in the kernel, use cpu 0 as fallback.
- */
-static inline
-int lttng_ust_get_cpu_internal(void)
-{
-       int cpu;
-
-       cpu = sched_getcpu();
-       if (caa_unlikely(cpu < 0))
-               return 0;
-       return cpu;
-}
-#endif /* HAVE_SCHED_GETCPU */
-
-#elif (defined(__FreeBSD__) || defined(__CYGWIN__))
-
-/*
- * FreeBSD and Cygwin do not allow query of CPU ID. Always use CPU
- * number 0, with the assocated performance degradation on SMP.
- */
-static inline
-int lttng_ust_get_cpu_internal(void)
-{
-       return 0;
-}
-
-#else
-#error "Please add support for your OS into liblttng-ust/compat.h."
-#endif
-
-#endif
-
-static inline
-int lttng_ust_get_cpu(void)
-{
-       int (*getcpu)(void) = CMM_LOAD_SHARED(lttng_get_cpu);
-
-       if (caa_likely(!getcpu)) {
-               return lttng_ust_get_cpu_internal();
-       } else {
-               return getcpu();
-       }
-}
-
-#endif /* _LTTNG_GETCPU_H */