ust-fd: Add close_range declaration

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

diff --git a/libringbuffer/shm.h b/libringbuffer/shm.h
deleted file mode 100644 (file)
index 6cac729..0000000
--- a/libringbuffer/shm.h
+++ /dev/null
@@ -1,126 +0,0 @@
-#ifndef _LIBRINGBUFFER_SHM_H
-#define _LIBRINGBUFFER_SHM_H
-
-/*
- * libringbuffer/shm.h
- *
- * Copyright 2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Dual LGPL v2.1/GPL v2 license.
- */
-
-#include <stdint.h>
-#include <ust/usterr-signal-safe.h>
-#include "ust/core.h"
-#include "shm_types.h"
-
-/*
- * Pointer dereferencing. We don't trust the shm_ref, so we validate
- * both the index and offset with known boundaries.
- *
- * "shmp" and "shmp_index" guarantee that it's safe to use the pointer
- * target type, even in the occurrence of shm_ref modification by an
- * untrusted process having write access to the shm_ref. We return a
- * NULL pointer if the ranges are invalid.
- */
-static inline
-char *_shmp_offset(struct shm_object_table *table, struct shm_ref *ref,
-                  size_t idx, size_t elem_size)
-{
-       struct shm_object *obj;
-       size_t objindex, ref_offset;
-
-       objindex = (size_t) ref->index;
-       if (caa_unlikely(objindex >= table->allocated_len))
-               return NULL;
-       obj = &table->objects[objindex];
-       ref_offset = (size_t) ref->offset;
-       ref_offset += idx * elem_size;
-       /* Check if part of the element returned would exceed the limits. */
-       if (caa_unlikely(ref_offset + elem_size > obj->memory_map_size))
-               return NULL;
-       return &obj->memory_map[ref_offset];
-}
-
-#define shmp_index(handle, ref, index)                                 \
-       ({                                                              \
-               __typeof__((ref)._type) ____ptr_ret;                    \
-               ____ptr_ret = (__typeof__(____ptr_ret)) _shmp_offset((handle)->table, &(ref)._ref, index, sizeof(*____ptr_ret));        \
-               ____ptr_ret;                                            \
-       })
-
-#define shmp(handle, ref)      shmp_index(handle, ref, 0)
-
-static inline
-void _set_shmp(struct shm_ref *ref, struct shm_ref src)
-{
-       *ref = src;
-}
-
-#define set_shmp(ref, src)     _set_shmp(&(ref)._ref, src)
-
-struct shm_object_table *shm_object_table_create(size_t max_nb_obj);
-struct shm_object *shm_object_table_append_shadow(struct shm_object_table *table,
-                       int shm_fd, int wait_fd, size_t memory_map_size);
-void shm_object_table_destroy(struct shm_object_table *table);
-struct shm_object *shm_object_table_append(struct shm_object_table *table,
-                                          size_t memory_map_size);
-
-/*
- * zalloc_shm - allocate memory within a shm object.
- *
- * Shared memory is already zeroed by shmget.
- * *NOT* multithread-safe (should be protected by mutex).
- * Returns a -1, -1 tuple on error.
- */
-struct shm_ref zalloc_shm(struct shm_object *obj, size_t len);
-void align_shm(struct shm_object *obj, size_t align);
-
-static inline
-int shm_get_wakeup_fd(struct lttng_ust_shm_handle *handle, struct shm_ref *ref)
-{
-       struct shm_object_table *table = handle->table;
-       struct shm_object *obj;
-       size_t index;
-
-       index = (size_t) ref->index;
-       if (caa_unlikely(index >= table->allocated_len))
-               return -EPERM;
-       obj = &table->objects[index];
-       return obj->wait_fd[1];
-
-}
-
-static inline
-int shm_get_wait_fd(struct lttng_ust_shm_handle *handle, struct shm_ref *ref)
-{
-       struct shm_object_table *table = handle->table;
-       struct shm_object *obj;
-       size_t index;
-
-       index = (size_t) ref->index;
-       if (caa_unlikely(index >= table->allocated_len))
-               return -EPERM;
-       obj = &table->objects[index];
-       return obj->wait_fd[0];
-}
-
-static inline
-int shm_get_object_data(struct lttng_ust_shm_handle *handle, struct shm_ref *ref,
-               int *shm_fd, int *wait_fd, uint64_t *memory_map_size)
-{
-       struct shm_object_table *table = handle->table;
-       struct shm_object *obj;
-       size_t index;
-
-       index = (size_t) ref->index;
-       if (caa_unlikely(index >= table->allocated_len))
-               return -EPERM;
-       obj = &table->objects[index];
-       *shm_fd = obj->shm_fd;
-       *wait_fd = obj->wait_fd[0];
-       *memory_map_size = obj->allocated_len;
-       return 0;
-}
-
-#endif /* _LIBRINGBUFFER_SHM_H */