libcamera: internal: Convert to pragma once

Remove the verbose #ifndef/#define/#endif pattern for maintaining
header idempotency, and replace it with a simple #pragma once.

This simplifies the headers, and prevents redundant changes when
header files get moved.

Tracepoints.h.in is not modified to use the pragma as it requires
self-inclusion.

Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>

include/libcamera/internal/bayer_format.h

@@ -4,8 +4,8 @@
  *
  * bayer_format.h - Bayer Pixel Format
  */
-#ifndef __LIBCAMERA_INTERNAL_BAYER_FORMAT_H__
-#define __LIBCAMERA_INTERNAL_BAYER_FORMAT_H__
+
+#pragma once
 
 #include <stdint.h>
 #include <string>
@@ -69,5 +69,3 @@ static inline bool operator!=(const BayerFormat &lhs, const BayerFormat &rhs)
 }
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_BAYER_FORMAT_H__ */

include/libcamera/internal/byte_stream_buffer.h

@@ -4,8 +4,8 @@
  *
  * byte_stream_buffer.h - Byte stream buffer
  */
-#ifndef __LIBCAMERA_INTERNAL_BYTE_STREAM_BUFFER_H__
-#define __LIBCAMERA_INTERNAL_BYTE_STREAM_BUFFER_H__
+
+#pragma once
 
 #include <stddef.h>
 #include <stdint.h>
@@ -85,5 +85,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_BYTE_STREAM_BUFFER_H__ */

include/libcamera/internal/camera.h

@@ -4,8 +4,8 @@
  *
  * camera.h - Camera private data
  */
-#ifndef __LIBCAMERA_INTERNAL_CAMERA_H__
-#define __LIBCAMERA_INTERNAL_CAMERA_H__
+
+#pragma once
 
 #include <atomic>
 #include <list>
@@ -72,5 +72,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_CAMERA_H__ */

include/libcamera/internal/camera_controls.h

@@ -4,8 +4,8 @@
  *
  * camera_controls.h - Camera controls
  */
-#ifndef __LIBCAMERA_INTERNAL_CAMERA_CONTROLS_H__
-#define __LIBCAMERA_INTERNAL_CAMERA_CONTROLS_H__
+
+#pragma once
 
 #include "libcamera/internal/control_validator.h"
 
@@ -26,5 +26,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_CAMERA_CONTROLS_H__ */

include/libcamera/internal/camera_sensor.h

@@ -4,8 +4,8 @@
  *
  * camera_sensor.h - A camera sensor
  */
-#ifndef __LIBCAMERA_INTERNAL_CAMERA_SENSOR_H__
-#define __LIBCAMERA_INTERNAL_CAMERA_SENSOR_H__
+
+#pragma once
 
 #include <memory>
 #include <string>
@@ -94,5 +94,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_CAMERA_SENSOR_H__ */

include/libcamera/internal/camera_sensor_properties.h

@@ -4,8 +4,8 @@
  *
  * camera_sensor_properties.h - Database of camera sensor properties
  */
-#ifndef __LIBCAMERA_SENSOR_CAMERA_SENSOR_PROPERTIES_H__
-#define __LIBCAMERA_SENSOR_CAMERA_SENSOR_PROPERTIES_H__
+
+#pragma once
 
 #include <map>
 #include <string>
@@ -22,5 +22,3 @@ struct CameraSensorProperties {
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_SENSOR_CAMERA_SENSOR_PROPERTIES_H__ */

include/libcamera/internal/control_serializer.h

@@ -4,8 +4,8 @@
  *
  * control_serializer.h - Control (de)serializer
  */
-#ifndef __LIBCAMERA_INTERNAL_CONTROL_SERIALIZER_H__
-#define __LIBCAMERA_INTERNAL_CONTROL_SERIALIZER_H__
+
+#pragma once
 
 #include <map>
 #include <memory>
@@ -60,5 +60,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_CONTROL_SERIALIZER_H__ */

include/libcamera/internal/control_validator.h

@@ -4,8 +4,8 @@
  *
  * control_validator.h - Control validator
  */
-#ifndef __LIBCAMERA_INTERNAL_CONTROL_VALIDATOR_H__
-#define __LIBCAMERA_INTERNAL_CONTROL_VALIDATOR_H__
+
+#pragma once
 
 #include <string>
 
@@ -23,5 +23,3 @@ public:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_CONTROL_VALIDATOR_H__ */

include/libcamera/internal/delayed_controls.h

@@ -4,8 +4,8 @@
  *
  * delayed_controls.h - Helper to deal with controls that take effect with a delay
  */
-#ifndef __LIBCAMERA_INTERNAL_DELAYED_CONTROLS_H__
-#define __LIBCAMERA_INTERNAL_DELAYED_CONTROLS_H__
+
+#pragma once
 
 #include <stdint.h>
 #include <unordered_map>
@@ -82,5 +82,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_DELAYED_CONTROLS_H__ */

include/libcamera/internal/device_enumerator.h

@@ -4,8 +4,8 @@
  *
  * device_enumerator.h - API to enumerate and find media devices
  */
-#ifndef __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_H__
-#define __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_H__
+
+#pragma once
 
 #include <memory>
 #include <string>
@@ -55,5 +55,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif	/* __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_H__ */

include/libcamera/internal/device_enumerator_sysfs.h

@@ -4,8 +4,8 @@
  *
  * device_enumerator_sysfs.h - sysfs-based device enumerator
  */
-#ifndef __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_SYSFS_H__
-#define __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_SYSFS_H__
+
+#pragma once
 
 #include <memory>
 #include <string>
@@ -28,5 +28,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_SYSFS_H__ */

include/libcamera/internal/device_enumerator_udev.h

@@ -4,8 +4,8 @@
  *
  * device_enumerator_udev.h - udev-based device enumerator
  */
-#ifndef __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_UDEV_H__
-#define __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_UDEV_H__
+
+#pragma once
 
 #include <list>
 #include <map>
@@ -71,5 +71,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif	/* __LIBCAMERA_INTERNAL_DEVICE_ENUMERATOR_UDEV_H__ */

include/libcamera/internal/formats.h

@@ -5,8 +5,7 @@
  * formats.h - libcamera image formats
  */
 
-#ifndef __LIBCAMERA_INTERNAL_FORMATS_H__
-#define __LIBCAMERA_INTERNAL_FORMATS_H__
+#pragma once
 
 #include <array>
 #include <map>
@@ -68,5 +67,3 @@ public:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_FORMATS_H__ */

include/libcamera/internal/framebuffer.h

@@ -4,8 +4,8 @@
  *
  * framebuffer.h - Internal frame buffer handling
  */
-#ifndef __LIBCAMERA_INTERNAL_FRAMEBUFFER_H__
-#define __LIBCAMERA_INTERNAL_FRAMEBUFFER_H__
+
+#pragma once
 
 #include <libcamera/base/class.h>
 
@@ -29,5 +29,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_FRAMEBUFFER_H__ */

include/libcamera/internal/ipa_data_serializer.h

@@ -4,8 +4,8 @@
  *
  * ipa_data_serializer.h - Image Processing Algorithm data serializer
  */
-#ifndef __LIBCAMERA_INTERNAL_IPA_DATA_SERIALIZER_H__
-#define __LIBCAMERA_INTERNAL_IPA_DATA_SERIALIZER_H__
+
+#pragma once
 
 #include <deque>
 #include <iostream>
@@ -304,5 +304,3 @@ public:
 #endif /* __DOXYGEN__ */
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_IPA_DATA_SERIALIZER_H__ */

include/libcamera/internal/ipa_manager.h

@@ -4,8 +4,8 @@
  *
  * ipa_manager.h - Image Processing Algorithm module manager
  */
-#ifndef __LIBCAMERA_INTERNAL_IPA_MANAGER_H__
-#define __LIBCAMERA_INTERNAL_IPA_MANAGER_H__
+
+#pragma once
 
 #include <stdint.h>
 #include <vector>
@@ -68,5 +68,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_IPA_MANAGER_H__ */

include/libcamera/internal/ipa_module.h

@@ -4,8 +4,8 @@
  *
  * ipa_module.h - Image Processing Algorithm module
  */
-#ifndef __LIBCAMERA_INTERNAL_IPA_MODULE_H__
-#define __LIBCAMERA_INTERNAL_IPA_MODULE_H__
+
+#pragma once
 
 #include <stdint.h>
 #include <string>
@@ -58,5 +58,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_IPA_MODULE_H__ */

include/libcamera/internal/ipa_proxy.h

@@ -4,8 +4,8 @@
  *
  * ipa_proxy.h - Image Processing Algorithm proxy
  */
-#ifndef __LIBCAMERA_INTERNAL_IPA_PROXY_H__
-#define __LIBCAMERA_INTERNAL_IPA_PROXY_H__
+
+#pragma once
 
 #include <memory>
 #include <string>
@@ -44,5 +44,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_IPA_PROXY_H__ */

include/libcamera/internal/ipc_pipe.h

@@ -4,8 +4,8 @@
  *
  * ipc_pipe.h - Image Processing Algorithm IPC module for IPA proxies
  */
-#ifndef __LIBCAMERA_INTERNAL_IPA_IPC_H__
-#define __LIBCAMERA_INTERNAL_IPA_IPC_H__
+
+#pragma once
 
 #include <vector>
 
@@ -67,5 +67,3 @@ protected:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_IPA_IPC_H__ */

include/libcamera/internal/ipc_pipe_unixsocket.h

@@ -4,8 +4,8 @@
  *
  * ipc_pipe_unixsocket.h - Image Processing Algorithm IPC module using unix socket
  */
-#ifndef __LIBCAMERA_INTERNAL_IPA_IPC_UNIXSOCKET_H__
-#define __LIBCAMERA_INTERNAL_IPA_IPC_UNIXSOCKET_H__
+
+#pragma once
 
 #include <map>
 #include <memory>
@@ -45,5 +45,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_IPA_IPC_UNIXSOCKET_H__ */

include/libcamera/internal/ipc_unixsocket.h

@@ -5,8 +5,7 @@
  * ipc_unixsocket.h - IPC mechanism based on Unix sockets
  */
 
-#ifndef __LIBCAMERA_INTERNAL_IPC_UNIXSOCKET_H__
-#define __LIBCAMERA_INTERNAL_IPC_UNIXSOCKET_H__
+#pragma once
 
 #include <stdint.h>
 #include <sys/types.h>
@@ -57,5 +56,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_IPC_UNIXSOCKET_H__ */

include/libcamera/internal/mapped_framebuffer.h

@@ -4,8 +4,8 @@
  *
  * mapped_framebuffer.h - Frame buffer memory mapping support
  */
-#ifndef __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__
-#define __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__
+
+#pragma once
 
 #include <stdint.h>
 #include <vector>
@@ -60,5 +60,3 @@ public:
 LIBCAMERA_FLAGS_ENABLE_OPERATORS(MappedFrameBuffer::MapFlag)
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_MAPPED_FRAMEBUFFER_H__ */

include/libcamera/internal/media_device.h

@@ -4,8 +4,8 @@
  *
  * media_device.h - Media device handler
  */
-#ifndef __LIBCAMERA_INTERNAL_MEDIA_DEVICE_H__
-#define __LIBCAMERA_INTERNAL_MEDIA_DEVICE_H__
+
+#pragma once
 
 #include <map>
 #include <sstream>
@@ -92,5 +92,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_MEDIA_DEVICE_H__ */

include/libcamera/internal/media_object.h

@@ -4,8 +4,8 @@
  *
  * media_object.h - Media Device objects: entities, pads and links.
  */
-#ifndef __LIBCAMERA_INTERNAL_MEDIA_OBJECT_H__
-#define __LIBCAMERA_INTERNAL_MEDIA_OBJECT_H__
+
+#pragma once
 
 #include <string>
 #include <vector>
@@ -132,5 +132,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_MEDIA_OBJECT_H__ */

include/libcamera/internal/pipeline_handler.h

@@ -4,8 +4,8 @@
  *
  * pipeline_handler.h - Pipeline handler infrastructure
  */
-#ifndef __LIBCAMERA_INTERNAL_PIPELINE_HANDLER_H__
-#define __LIBCAMERA_INTERNAL_PIPELINE_HANDLER_H__
+
+#pragma once
 
 #include <memory>
 #include <set>
@@ -118,5 +118,3 @@ private:								\
 static handler##Factory global_##handler##Factory;
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_PIPELINE_HANDLER_H__ */

include/libcamera/internal/process.h

@@ -4,8 +4,8 @@
  *
  * process.h - Process object
  */
-#ifndef __LIBCAMERA_INTERNAL_PROCESS_H__
-#define __LIBCAMERA_INTERNAL_PROCESS_H__
+
+#pragma once
 
 #include <signal.h>
 #include <string>
@@ -80,5 +80,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_PROCESS_H__ */

include/libcamera/internal/pub_key.h

@@ -4,8 +4,8 @@
  *
  * pub_key.h - Public key signature verification
  */
-#ifndef __LIBCAMERA_INTERNAL_PUB_KEY_H__
-#define __LIBCAMERA_INTERNAL_PUB_KEY_H__
+
+#pragma once
 
 #include <stdint.h>
 
@@ -34,5 +34,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_PUB_KEY_H__ */

include/libcamera/internal/source_paths.h

@@ -4,8 +4,8 @@
  *
  * source_paths.h - Identify libcamera source and build paths
  */
-#ifndef __LIBCAMERA_INTERNAL_SOURCE_PATHS_H__
-#define __LIBCAMERA_INTERNAL_SOURCE_PATHS_H__
+
+#pragma once
 
 #include <string>
 
@@ -15,5 +15,3 @@ std::string libcameraBuildPath();
 std::string libcameraSourcePath();
 
 } /* namespace libcamera::utils */
-
-#endif /* __LIBCAMERA_INTERNAL_SOURCE_PATHS_H__ */

include/libcamera/internal/sysfs.h

@@ -4,8 +4,8 @@
  *
  * sysfs.h - Miscellaneous utility functions to access sysfs
  */
-#ifndef __LIBCAMERA_INTERNAL_SYSFS_H__
-#define __LIBCAMERA_INTERNAL_SYSFS_H__
+
+#pragma once
 
 #include <string>
 
@@ -20,5 +20,3 @@ std::string firmwareNodePath(const std::string &device);
 } /* namespace sysfs */
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_SYSFS_H__ */

include/libcamera/internal/v4l2_device.h

@@ -4,8 +4,8 @@
  *
  * v4l2_device.h - Common base for V4L2 video devices and subdevices
  */
-#ifndef __LIBCAMERA_INTERNAL_V4L2_DEVICE_H__
-#define __LIBCAMERA_INTERNAL_V4L2_DEVICE_H__
+
+#pragma once
 
 #include <map>
 #include <memory>
@@ -79,5 +79,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_V4L2_DEVICE_H__ */

include/libcamera/internal/v4l2_pixelformat.h

@@ -5,8 +5,8 @@
  *
  * v4l2_pixelformat.h - V4L2 Pixel Format
  */
-#ifndef __LIBCAMERA_INTERNAL_V4L2_PIXELFORMAT_H__
-#define __LIBCAMERA_INTERNAL_V4L2_PIXELFORMAT_H__
+
+#pragma once
 
 #include <stdint.h>
 #include <string>
@@ -51,5 +51,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_V4L2_PIXELFORMAT_H__ */

include/libcamera/internal/v4l2_subdevice.h

@@ -4,8 +4,8 @@
  *
  * v4l2_subdevice.h - V4L2 Subdevice
  */
-#ifndef __LIBCAMERA_INTERNAL_V4L2_SUBDEVICE_H__
-#define __LIBCAMERA_INTERNAL_V4L2_SUBDEVICE_H__
+
+#pragma once
 
 #include <memory>
 #include <string>
@@ -78,5 +78,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_V4L2_SUBDEVICE_H__ */

include/libcamera/internal/v4l2_videodevice.h

@@ -4,8 +4,8 @@
  *
  * v4l2_videodevice.h - V4L2 Video Device
  */
-#ifndef __LIBCAMERA_INTERNAL_V4L2_VIDEODEVICE_H__
-#define __LIBCAMERA_INTERNAL_V4L2_VIDEODEVICE_H__
+
+#pragma once
 
 #include <array>
 #include <atomic>
@@ -278,5 +278,3 @@ private:
 };
 
 } /* namespace libcamera */
-
-#endif /* __LIBCAMERA_INTERNAL_V4L2_VIDEODEVICE_H__ */