freebsd port: use a leading / prefix for shm tmp name

[lttng-ust.git] / libringbuffer / ring_buffer_frontend.c

diff --git a/libringbuffer/ring_buffer_frontend.c b/libringbuffer/ring_buffer_frontend.c
index 18c47ddf8552019534db40d9fadc7a4e4f6977af..5629876983ee56ca7d5d1c4509d45d4dca5f5f38 100644 (file)
--- a/libringbuffer/ring_buffer_frontend.c
+++ b/libringbuffer/ring_buffer_frontend.c
@@ -38,19 +38,22 @@
  * Dual LGPL v2.1/GPL v2 license.
  */
 
+#define _GNU_SOURCE
 #include <sys/types.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <urcu/compiler.h>
 #include <urcu/ref.h>
+#include <helper.h>
 
-#include "vatomic.h"
 #include "smp.h"
 #include <lttng/ringbuffer-config.h>
+#include "vatomic.h"
 #include "backend.h"
 #include "frontend.h"
 #include "shm.h"
+#include "../liblttng-ust/compat.h"    /* For ENODATA */
 
 #ifndef max
 #define max(a, b)      ((a) > (b) ? (a) : (b))
@@ -91,7 +94,8 @@ __thread unsigned int lib_ring_buffer_nesting;
 static
 void lib_ring_buffer_print_errors(struct channel *chan,
                                  struct lttng_ust_lib_ring_buffer *buf, int cpu,
-                                 struct lttng_ust_shm_handle *handle);
+                                 struct lttng_ust_shm_handle *handle)
+       __attribute__((unused));
 
 /**
  * lib_ring_buffer_reset - Reset ring buffer to initial values.
@@ -166,7 +170,7 @@ int lib_ring_buffer_create(struct lttng_ust_lib_ring_buffer *buf,
        struct channel *chan = caa_container_of(chanb, struct channel, backend);
        void *priv = channel_get_private(chan);
        size_t subbuf_header_size;
-       u64 tsc;
+       uint64_t tsc;
        int ret;
 
        /* Test for cpu hotplug */
@@ -419,7 +423,7 @@ struct lttng_ust_shm_handle *channel_create(const struct lttng_ust_lib_ring_buff
                   void *buf_addr, size_t subbuf_size,
                   size_t num_subbuf, unsigned int switch_timer_interval,
                   unsigned int read_timer_interval,
-                  int *shm_fd, int *wait_fd, uint64_t *memory_map_size)
+                  int **shm_fd, int **wait_fd, uint64_t **memory_map_size)
 {
        int ret, cpu;
        size_t shmsize, chansize;
@@ -609,8 +613,8 @@ struct lttng_ust_lib_ring_buffer *channel_get_ring_buffer(
                                        const struct lttng_ust_lib_ring_buffer_config *config,
                                        struct channel *chan, int cpu,
                                        struct lttng_ust_shm_handle *handle,
-                                       int *shm_fd, int *wait_fd,
-                                       uint64_t *memory_map_size)
+                                       int **shm_fd, int **wait_fd,
+                                       uint64_t **memory_map_size)
 {
        struct shm_ref *ref;
 
@@ -945,12 +949,6 @@ void lib_ring_buffer_print_buffer_errors(struct lttng_ust_lib_ring_buffer *buf,
        const struct lttng_ust_lib_ring_buffer_config *config = &chan->backend.config;
        unsigned long write_offset, cons_offset;
 
-       /*
-        * Can be called in the error path of allocation when
-        * trans_channel_data is not yet set.
-        */
-       if (!chan)
-               return;
        /*
         * No need to order commit_count, write_offset and cons_offset reads
         * because we execute at teardown when no more writer nor reader
@@ -1010,7 +1008,7 @@ static
 void lib_ring_buffer_switch_old_start(struct lttng_ust_lib_ring_buffer *buf,
                                      struct channel *chan,
                                      struct switch_offsets *offsets,
-                                     u64 tsc,
+                                     uint64_t tsc,
                                      struct lttng_ust_shm_handle *handle)
 {
        const struct lttng_ust_lib_ring_buffer_config *config = &chan->backend.config;
@@ -1048,7 +1046,7 @@ static
 void lib_ring_buffer_switch_old_end(struct lttng_ust_lib_ring_buffer *buf,
                                    struct channel *chan,
                                    struct switch_offsets *offsets,
-                                   u64 tsc,
+                                   uint64_t tsc,
                                    struct lttng_ust_shm_handle *handle)
 {
        const struct lttng_ust_lib_ring_buffer_config *config = &chan->backend.config;
@@ -1085,7 +1083,7 @@ static
 void lib_ring_buffer_switch_new_start(struct lttng_ust_lib_ring_buffer *buf,
                                      struct channel *chan,
                                      struct switch_offsets *offsets,
-                                     u64 tsc,
+                                     uint64_t tsc,
                                      struct lttng_ust_shm_handle *handle)
 {
        const struct lttng_ust_lib_ring_buffer_config *config = &chan->backend.config;
@@ -1121,7 +1119,7 @@ static
 void lib_ring_buffer_switch_new_end(struct lttng_ust_lib_ring_buffer *buf,
                                    struct channel *chan,
                                    struct switch_offsets *offsets,
-                                   u64 tsc,
+                                   uint64_t tsc,
                                    struct lttng_ust_shm_handle *handle)
 {
        const struct lttng_ust_lib_ring_buffer_config *config = &chan->backend.config;
@@ -1157,7 +1155,7 @@ int lib_ring_buffer_try_switch_slow(enum switch_mode mode,
                                    struct lttng_ust_lib_ring_buffer *buf,
                                    struct channel *chan,
                                    struct switch_offsets *offsets,
-                                   u64 *tsc)
+                                   uint64_t *tsc)
 {
        const struct lttng_ust_lib_ring_buffer_config *config = &chan->backend.config;
        unsigned long off;
@@ -1222,7 +1220,7 @@ void lib_ring_buffer_switch_slow(struct lttng_ust_lib_ring_buffer *buf, enum swi
        const struct lttng_ust_lib_ring_buffer_config *config = &chan->backend.config;
        struct switch_offsets offsets;
        unsigned long oldidx;
-       u64 tsc;
+       uint64_t tsc;
 
        offsets.size = 0;