Move all sources to 'src/'

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

diff --git a/libcounter/shm.h b/libcounter/shm.h
deleted file mode 100644 (file)
index 8ec251d..0000000
--- a/libcounter/shm.h
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#ifndef _LIBCOUNTER_SHM_H
-#define _LIBCOUNTER_SHM_H
-
-#include <stddef.h>
-#include <stdint.h>
-#include <unistd.h>
-#include <usterr-signal-safe.h>
-#include <urcu/compiler.h>
-#include "shm_types.h"
-
-/* lttng_counter_handle_create - for UST. */
-extern
-struct lttng_counter_shm_handle *lttng_counter_handle_create(void *data,
-                               uint64_t memory_map_size, int wakeup_fd);
-/* lttng_counter_handle_add_cpu - for UST. */
-extern
-int lttng_counter_handle_add_cpu(struct lttng_counter_shm_handle *handle,
-               int shm_fd, uint32_t cpu_nr,
-               uint64_t memory_map_size);
-
-unsigned int lttng_counter_handle_get_nr_cpus(struct lttng_counter_shm_handle *handle)
-       __attribute__((visibility("hidden")));
-
-/*
- * 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 *_lttng_counter_shmp_offset(struct lttng_counter_shm_object_table *table,
-               struct lttng_counter_shm_ref *ref,
-               size_t idx, size_t elem_size)
-{
-       struct lttng_counter_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 lttng_counter_shmp_index(handle, ref, index)                   \
-       ({                                                              \
-               __typeof__((ref)._type) ____ptr_ret;                    \
-               ____ptr_ret = (__typeof__(____ptr_ret)) _lttng_counter_shmp_offset((handle)->table, &(ref)._ref, index, sizeof(*____ptr_ret));  \
-               ____ptr_ret;                                            \
-       })
-
-#define lttng_counter_shmp(handle, ref)        lttng_counter_shmp_index(handle, ref, 0)
-
-static inline
-void _lttng_counter_set_shmp(struct lttng_counter_shm_ref *ref, struct lttng_counter_shm_ref src)
-{
-       *ref = src;
-}
-
-#define lttng_counter_set_shmp(ref, src)       _lttng_counter_set_shmp(&(ref)._ref, src)
-
-struct lttng_counter_shm_object_table *lttng_counter_shm_object_table_create(size_t max_nb_obj)
-       __attribute__((visibility("hidden")));
-
-struct lttng_counter_shm_object *lttng_counter_shm_object_table_alloc(struct lttng_counter_shm_object_table *table,
-                       size_t memory_map_size,
-                       enum lttng_counter_shm_object_type type,
-                       const int cpu_fd,
-                       int cpu)
-       __attribute__((visibility("hidden")));
-
-struct lttng_counter_shm_object *lttng_counter_shm_object_table_append_shm(struct lttng_counter_shm_object_table *table,
-                       int shm_fd, size_t memory_map_size)
-       __attribute__((visibility("hidden")));
-
-/* mem ownership is passed to lttng_counter_shm_object_table_append_mem(). */
-struct lttng_counter_shm_object *lttng_counter_shm_object_table_append_mem(struct lttng_counter_shm_object_table *table,
-                       void *mem, size_t memory_map_size)
-       __attribute__((visibility("hidden")));
-
-void lttng_counter_shm_object_table_destroy(struct lttng_counter_shm_object_table *table, int consumer)
-       __attribute__((visibility("hidden")));
-
-/*
- * lttng_counter_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 lttng_counter_shm_ref lttng_counter_zalloc_shm(struct lttng_counter_shm_object *obj, size_t len)
-       __attribute__((visibility("hidden")));
-
-void lttng_counter_align_shm(struct lttng_counter_shm_object *obj, size_t align)
-       __attribute__((visibility("hidden")));
-
-static inline
-int lttng_counter_shm_get_shm_fd(struct lttng_counter_shm_handle *handle, struct lttng_counter_shm_ref *ref)
-{
-       struct lttng_counter_shm_object_table *table = handle->table;
-       struct lttng_counter_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->shm_fd;
-}
-
-
-static inline
-int lttng_counter_shm_get_shm_size(struct lttng_counter_shm_handle *handle, struct lttng_counter_shm_ref *ref,
-               uint64_t *size)
-{
-       struct lttng_counter_shm_object_table *table = handle->table;
-       struct lttng_counter_shm_object *obj;
-       size_t index;
-
-       index = (size_t) ref->index;
-       if (caa_unlikely(index >= table->allocated_len))
-               return -EPERM;
-       obj = &table->objects[index];
-       *size = obj->memory_map_size;
-       return 0;
-}
-
-#endif /* _LIBCOUNTER_SHM_H */