Get rid of C_SIDE

wlroots headers can mostly be included with extern "C" blocks. Two
exceptions are the use of `static` for array args and `class` as a
struct field. These can be #define'ed to avoid C++ build errors.

This allows the whole project to be built as a single C++ codebase,
without having to maintain hybrid header files.

meson.build

@@ -68,7 +68,7 @@ executable(
     'gamescope',
     'src/steamcompmgr.cpp',
     'src/main.cpp',
-	'src/wlserver.c',
+	'src/wlserver.cpp',
 	'src/drm.cpp',
 	'src/inputsdl.cpp',
 	'src/vblankmanager.cpp',

src/drm.hpp

@@ -7,12 +7,13 @@
 #include <assert.h>
 #include <drm_fourcc.h>
 
+extern "C" {
+#include <libliftoff.h>
 #include <wlr/render/dmabuf.h>
+}
 
 #include "rendervulkan.hpp"
 
-#ifndef C_SIDE
-
 #include <unordered_map>
 #include <utility>
 #include <atomic>
@@ -85,13 +86,6 @@ struct drm_t {
 	
 	std::atomic < uint64_t > flipcount;
 };
-#endif
-
-#ifndef C_SIDE
-extern "C" {
-#endif
-	
-#include "libliftoff.h"
 
 extern struct drm_t g_DRM;
 
@@ -106,7 +100,3 @@ int drm_atomic_commit(struct drm_t *drm, struct Composite_t *pComposite, struct
 uint32_t drm_fbid_from_dmabuf( struct drm_t *drm, struct wlr_dmabuf_attributes *dma_buf );
 void drm_drop_fbid( struct drm_t *drm, uint32_t fbid );
 bool drm_can_avoid_composite( struct drm_t *drm, struct Composite_t *pComposite, struct VulkanPipeline_t *pPipeline );
-
-#ifndef C_SIDE
-}
-#endif

src/inputsdl.cpp

@@ -9,7 +9,7 @@
 #include <SDL.h>
 
 #include "inputsdl.hpp"
-#include "wlserver.h"
+#include "wlserver.hpp"
 #include "main.hpp"
 
 std::mutex g_SDLInitLock;

src/inputsdl.hpp

@@ -2,12 +2,4 @@
 
 #pragma once
 
-#ifndef C_SIDE
-extern "C" {
-#endif
-
 bool inputsdl_init( void );
-
-#ifndef C_SIDE
-}
-#endif

src/main.cpp

@@ -6,13 +6,12 @@
 
 #include <unistd.h>
 
-#include "wlserver.h"
-
 #include "main.hpp"
 #include "steamcompmgr.hpp"
 #include "drm.hpp"
 #include "rendervulkan.hpp"
 #include "inputsdl.hpp"
+#include "wlserver.hpp"
 
 int ac;
 char **av;

src/main.hpp

@@ -1,14 +1,8 @@
-#ifndef C_SIDE
-extern "C" {
-#endif
-	
 #include <SDL.h>
 #include <SDL_vulkan.h>
 
 extern SDL_Window *window;
 
-#include "wlr/render/dmabuf.h"
-
 int initOutput(void);
 
 void startSteamCompMgr(void);
@@ -30,7 +24,3 @@ extern bool g_bFilterGameWindow;
 extern uint32_t g_nSubCommandArg;
 
 int BIsNested( void );
-
-#ifndef C_SIDE
-}
-#endif

src/rendervulkan.hpp

@@ -42,20 +42,16 @@ struct Composite_t
 
 #include "drm.hpp"
 
-#ifndef C_SIDE
-
 #include <unordered_map>
 #include <vector>
 
 extern "C" {
-#endif
+#include <wlr/render/dmabuf.h>
+}
 
 #include <vulkan/vulkan.h>
-#include <wlr/render/dmabuf.h>
 #include <drm_fourcc.h>
 
-#ifndef C_SIDE
-	
 class CVulkanTexture
 {
 public:
@@ -82,8 +78,6 @@ public:
 
 extern std::vector< const char * > g_vecSDLInstanceExts;
 
-#endif
-
 int vulkan_init(void);
 
 VulkanTexture_t vulkan_create_texture_from_dmabuf( struct wlr_dmabuf_attributes *pDMA );
@@ -103,7 +97,3 @@ void vulkan_present_to_window( void );
 
 void vulkan_garbage_collect( void );
 bool vulkan_remake_swapchain( void );
-
-#ifndef C_SIDE
-}
-#endif

src/steamcompmgr.cpp

@@ -61,7 +61,7 @@
 #include <X11/extensions/xf86vmode.h>
 
 #include "main.hpp"
-#include "wlserver.h"
+#include "wlserver.hpp"
 #include "drm.hpp"
 #include "rendervulkan.hpp"
 #include "steamcompmgr.hpp"

src/steamcompmgr.hpp

@@ -1,7 +1,3 @@
-#ifndef C_SIDE
-extern "C" {
-#endif
-
 #include <stdint.h>
 
 extern uint32_t currentOutputWidth;
@@ -11,9 +7,6 @@ unsigned int get_time_in_milliseconds(void);
 
 int steamcompmgr_main(int argc, char **argv);
 
-#ifndef C_SIDE
-}
-
 #include "rendervulkan.hpp"
 
 #include <mutex>
@@ -78,5 +71,3 @@ private:
 
 extern std::mutex wayland_commit_lock;
 extern std::vector<ResListEntry_t> wayland_commit_queue;
-
-#endif

src/vblankmanager.cpp

@@ -12,7 +12,7 @@
 
 #include "vblankmanager.hpp"
 #include "steamcompmgr.hpp"
-#include "wlserver.h"
+#include "wlserver.hpp"
 #include "main.hpp"
 
 static Display *g_nestedDpy;

src/wlserver.cpp

@@ -1,5 +1,4 @@
-#define _POSIX_C_SOURCE 200112L
-#define _GNU_SOURCE
+#define _GNU_SOURCE 1
 
 #include <assert.h>
 #include <signal.h>
@@ -16,18 +15,23 @@
 #include <xkbcommon/xkbcommon.h>
 
 #include <wayland-server-core.h>
+
+extern "C" {
+#define static
+#define class class_
 #include <wlr/backend.h>
 #include <wlr/backend/headless.h>
 #include <wlr/backend/multi.h>
 #include <wlr/backend/libinput.h>
 #include <wlr/interfaces/wlr_pointer.h>
 #include <wlr/render/wlr_renderer.h>
+#include <wlr/xwayland.h>
 #include <wlr/util/log.h>
+#undef static
+#undef class
+}
 
-#define C_SIDE
-
-#include "steamcompmgr.hpp"
-#include "wlserver.h"
+#include "wlserver.hpp"
 #include "drm.hpp"
 #include "main.hpp"
 
@@ -67,7 +71,7 @@ void nudge_steamcompmgr(void)
 	XFlush( g_XWLDpy );
 }
 
-const struct wlr_surface_role xwayland_surface_role;
+extern const struct wlr_surface_role xwayland_surface_role;
 
 void xwayland_surface_role_commit(struct wlr_surface *wlr_surface) {
 	assert(wlr_surface->role == &xwayland_surface_role);
@@ -91,7 +95,7 @@ void xwayland_surface_role_commit(struct wlr_surface *wlr_surface) {
 
 static void xwayland_surface_role_precommit(struct wlr_surface *wlr_surface) {
 	assert(wlr_surface->role == &xwayland_surface_role);
-	struct wlr_xwayland_surface *surface = wlr_surface->role_data;
+	struct wlr_xwayland_surface *surface = (struct wlr_xwayland_surface *) wlr_surface->role_data;
 	if (surface == NULL) {
 		return;
 	}
@@ -123,7 +127,7 @@ static void wlserver_handle_modifiers(struct wl_listener *listener, void *data)
 static void wlserver_handle_key(struct wl_listener *listener, void *data)
 {
 	struct wlserver_keyboard *keyboard = wl_container_of( listener, keyboard, key );
-	struct wlr_event_keyboard_key *event = data;
+	struct wlr_event_keyboard_key *event = (struct wlr_event_keyboard_key *) data;
 
 	xkb_keycode_t keycode = event->keycode + 8;
 	xkb_keysym_t keysym = xkb_state_key_get_one_sym(keyboard->device->keyboard->xkb_state, keycode);
@@ -168,7 +172,7 @@ static void wlserver_movecursor( int x, int y )
 static void wlserver_handle_pointer_motion(struct wl_listener *listener, void *data)
 {
 	struct wlserver_pointer *pointer = wl_container_of( listener, pointer, motion );
-	struct wlr_event_pointer_motion *event = data;
+	struct wlr_event_pointer_motion *event = (struct wlr_event_pointer_motion *) data;
 	
 	if ( wlserver.mouse_focus_surface != NULL )
 	{
@@ -182,7 +186,7 @@ static void wlserver_handle_pointer_motion(struct wl_listener *listener, void *d
 static void wlserver_handle_pointer_button(struct wl_listener *listener, void *data)
 {
 	struct wlserver_pointer *pointer = wl_container_of( listener, pointer, button );
-	struct wlr_event_pointer_button *event = data;
+	struct wlr_event_pointer_button *event = (struct wlr_event_pointer_button *) data;
 	
 	wlr_seat_pointer_notify_button( wlserver.wlr.seat, event->time_msec, event->button, event->state );
 	wlr_seat_pointer_notify_frame( wlserver.wlr.seat );
@@ -207,7 +211,7 @@ static inline uint32_t steamcompmgr_button_to_wlserver_button( int button )
 static void wlserver_handle_touch_down(struct wl_listener *listener, void *data)
 {
 	struct wlserver_touch *touch = wl_container_of( listener, touch, down );
-	struct wlr_event_touch_down *event = data;
+	struct wlr_event_touch_down *event = (struct wlr_event_touch_down *) data;
 	
 	if ( wlserver.mouse_focus_surface != NULL )
 	{
@@ -235,7 +239,7 @@ static void wlserver_handle_touch_down(struct wl_listener *listener, void *data)
 static void wlserver_handle_touch_up(struct wl_listener *listener, void *data)
 {
 	struct wlserver_touch *touch = wl_container_of( listener, touch, up );
-	struct wlr_event_touch_up *event = data;
+	struct wlr_event_touch_up *event = (struct wlr_event_touch_up *) data;
 
 	if ( wlserver.mouse_focus_surface != NULL )
 	{
@@ -262,7 +266,7 @@ static void wlserver_handle_touch_up(struct wl_listener *listener, void *data)
 static void wlserver_handle_touch_motion(struct wl_listener *listener, void *data)
 {
 	struct wlserver_touch *touch = wl_container_of( listener, touch, motion );
-	struct wlr_event_touch_motion *event = data;
+	struct wlr_event_touch_motion *event = (struct wlr_event_touch_motion *) data;
 	
 	if ( wlserver.mouse_focus_surface != NULL )
 	{
@@ -279,13 +283,13 @@ static void wlserver_handle_touch_motion(struct wl_listener *listener, void *dat
 
 static void wlserver_new_input(struct wl_listener *listener, void *data)
 {
-	struct wlr_input_device *device = data;
+	struct wlr_input_device *device = (struct wlr_input_device *) data;
 
 	switch ( device->type )
 	{
 		case WLR_INPUT_DEVICE_KEYBOARD:
 		{
-			struct wlserver_keyboard *pKB = calloc( 1, sizeof( struct wlserver_keyboard ) );
+			struct wlserver_keyboard *pKB = (struct wlserver_keyboard *) calloc( 1, sizeof( struct wlserver_keyboard ) );
 			
 			pKB->device = device;
 			
@@ -310,7 +314,7 @@ static void wlserver_new_input(struct wl_listener *listener, void *data)
 		break;
 		case WLR_INPUT_DEVICE_POINTER:
 		{
-			struct wlserver_pointer *pointer = calloc( 1, sizeof( struct wlserver_pointer ) );
+			struct wlserver_pointer *pointer = (struct wlserver_pointer *) calloc( 1, sizeof( struct wlserver_pointer ) );
 			
 			pointer->device = device;
 
@@ -322,7 +326,7 @@ static void wlserver_new_input(struct wl_listener *listener, void *data)
 		break;
 		case WLR_INPUT_DEVICE_TOUCH:
 		{
-			struct wlserver_touch *touch = calloc( 1, sizeof( struct wlserver_touch ) );
+			struct wlserver_touch *touch = (struct wlserver_touch *) calloc( 1, sizeof( struct wlserver_touch ) );
 			
 			touch->device = device;
 			

src/wlserver.hpp

@@ -2,14 +2,7 @@
 
 #pragma once
 
-// Only define wlserver_t on the C side, as wlroots can't build as C++
-#ifdef C_SIDE
-
 #include <wayland-server-core.h>
-#include <wlr/backend.h>
-#include <wlr/backend/session.h>
-#include <wlr/render/wlr_renderer.h>
-#include <wlr/xwayland.h>
 
 #define WLSERVER_BUTTON_COUNT 4
 
@@ -62,12 +55,6 @@ struct wlserver_touch {
 
 extern struct wlserver_t wlserver;
 
-#endif
-
-#ifndef C_SIDE
-extern "C" {
-#endif
-	
 extern bool run;
 
 extern int g_nTouchClickMode;
@@ -95,7 +82,3 @@ void wlserver_send_frame_done( struct wlr_surface *surf, const struct timespec *
 struct wlr_surface *wlserver_get_surface( long surfaceID );
 
 const char *wlserver_get_nested_display( void );
-
-#ifndef C_SIDE
-}
-#endif