mirror of
https://github.com/varun-r-mallya/sysprof.git
synced 2025-12-31 20:36:25 +00:00
93 lines
4.2 KiB
C
93 lines
4.2 KiB
C
/* mapped-ring-buffer.h
|
|
*
|
|
* Copyright 2020 Christian Hergert <chergert@redhat.com>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* SPDX-License-Identifier: GPL-3.0-or-later
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <glib.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef struct _MappedRingBuffer MappedRingBuffer;
|
|
|
|
/**
|
|
* MappedRingBufferCallback:
|
|
* @data: a pointer into the mapped buffer containing the data frame
|
|
* @length: (inout): the number of bytes to advance
|
|
* @user_data: closure data provided to mapped_ring_buffer_drain()
|
|
*
|
|
* Functions matching this prototype will be called from the
|
|
* mapped_ring_buffer_drain() function for each data frame read from the
|
|
* underlying memory mapping.
|
|
*
|
|
* @length is initially set to the max bytes that @data could contain, but
|
|
* should be set by the caller to the amount of bytes known to have been
|
|
* consumed. This allows MappedRingBuffer to avoid storing length data or
|
|
* framing information as that can come from the buffer content.
|
|
*
|
|
* The callback should shorten @length if it knows the frame is less than
|
|
* what was provided.
|
|
*
|
|
* This function can also be used with mapped_ring_buffer_create_source()
|
|
* to automatically drain the ring buffer as part of the main loop progress.
|
|
*
|
|
* Returns: %TRUE to coninue draining, otherwise %FALSE and draining stops
|
|
*/
|
|
typedef gboolean (*MappedRingBufferCallback) (gconstpointer data,
|
|
gsize *length,
|
|
gpointer user_data);
|
|
|
|
G_GNUC_INTERNAL
|
|
MappedRingBuffer *mapped_ring_buffer_new_reader (gsize buffer_size);
|
|
G_GNUC_INTERNAL
|
|
MappedRingBuffer *mapped_ring_buffer_new_readwrite (gsize buffer_size);
|
|
G_GNUC_INTERNAL
|
|
MappedRingBuffer *mapped_ring_buffer_new_writer (gint fd);
|
|
G_GNUC_INTERNAL
|
|
gint mapped_ring_buffer_get_fd (MappedRingBuffer *self);
|
|
G_GNUC_INTERNAL
|
|
MappedRingBuffer *mapped_ring_buffer_ref (MappedRingBuffer *self);
|
|
G_GNUC_INTERNAL
|
|
void mapped_ring_buffer_unref (MappedRingBuffer *self);
|
|
G_GNUC_INTERNAL
|
|
void mapped_ring_buffer_clear (MappedRingBuffer *self);
|
|
G_GNUC_INTERNAL
|
|
gpointer mapped_ring_buffer_allocate (MappedRingBuffer *self,
|
|
gsize length);
|
|
G_GNUC_INTERNAL
|
|
void mapped_ring_buffer_advance (MappedRingBuffer *self,
|
|
gsize length);
|
|
G_GNUC_INTERNAL
|
|
gboolean mapped_ring_buffer_drain (MappedRingBuffer *self,
|
|
MappedRingBufferCallback callback,
|
|
gpointer user_data);
|
|
G_GNUC_INTERNAL
|
|
guint mapped_ring_buffer_create_source (MappedRingBuffer *self,
|
|
MappedRingBufferCallback callback,
|
|
gpointer user_data);
|
|
G_GNUC_INTERNAL
|
|
guint mapped_ring_buffer_create_source_full (MappedRingBuffer *self,
|
|
MappedRingBufferCallback callback,
|
|
gpointer user_data,
|
|
GDestroyNotify destroy);
|
|
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC (MappedRingBuffer, mapped_ring_buffer_unref)
|
|
|
|
G_END_DECLS
|