cmake: prefer system gamemode library

1 files changed, 0 insertions, 379 deletions

diff --git a/externals/gamemode/include/gamemode_client.h b/externals/gamemode/include/gamemode_client.h
deleted file mode 100644
index 184812334..000000000
--- a/externals/gamemode/include/gamemode_client.h
+++ /dev/null
@@ -1,379 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2017-2019 Feral Interactive
-// SPDX-License-Identifier: BSD-3-Clause
-
-/*
-
-Copyright (c) 2017-2019, Feral Interactive
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright notice,
-   this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above copyright
-   notice, this list of conditions and the following disclaimer in the
-   documentation and/or other materials provided with the distribution.
- * Neither the name of Feral Interactive nor the names of its contributors
-   may be used to endorse or promote products derived from this software
-   without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.
-
- */
-#ifndef CLIENT_GAMEMODE_H
-#define CLIENT_GAMEMODE_H
-/*
- * GameMode supports the following client functions
- * Requests are refcounted in the daemon
- *
- * int gamemode_request_start() - Request gamemode starts
- *   0 if the request was sent successfully
- *   -1 if the request failed
- *
- * int gamemode_request_end() - Request gamemode ends
- *   0 if the request was sent successfully
- *   -1 if the request failed
- *
- * GAMEMODE_AUTO can be defined to make the above two functions apply during static init and
- * destruction, as appropriate. In this configuration, errors will be printed to stderr
- *
- * int gamemode_query_status() - Query the current status of gamemode
- *   0 if gamemode is inactive
- *   1 if gamemode is active
- *   2 if gamemode is active and this client is registered
- *   -1 if the query failed
- *
- * int gamemode_request_start_for(pid_t pid) - Request gamemode starts for another process
- *   0 if the request was sent successfully
- *   -1 if the request failed
- *   -2 if the request was rejected
- *
- * int gamemode_request_end_for(pid_t pid) - Request gamemode ends for another process
- *   0 if the request was sent successfully
- *   -1 if the request failed
- *   -2 if the request was rejected
- *
- * int gamemode_query_status_for(pid_t pid) - Query status of gamemode for another process
- *   0 if gamemode is inactive
- *   1 if gamemode is active
- *   2 if gamemode is active and this client is registered
- *   -1 if the query failed
- *
- * const char* gamemode_error_string() - Get an error string
- *   returns a string describing any of the above errors
- *
- * Note: All the above requests can be blocking - dbus requests can and will block while the daemon
- * handles the request. It is not recommended to make these calls in performance critical code
- */
-
-#include <stdbool.h>
-#include <stdio.h>
-
-#include <dlfcn.h>
-#include <string.h>
-
-#include <assert.h>
-
-#include <sys/types.h>
-
-static char internal_gamemode_client_error_string[512] = { 0 };
-
-/**
- * Load libgamemode dynamically to dislodge us from most dependencies.
- * This allows clients to link and/or use this regardless of runtime.
- * See SDL2 for an example of the reasoning behind this in terms of
- * dynamic versioning as well.
- */
-static volatile int internal_libgamemode_loaded = 1;
-
-/* Typedefs for the functions to load */
-typedef int (*api_call_return_int)(void);
-typedef const char *(*api_call_return_cstring)(void);
-typedef int (*api_call_pid_return_int)(pid_t);
-
-/* Storage for functors */
-static api_call_return_int REAL_internal_gamemode_request_start = NULL;
-static api_call_return_int REAL_internal_gamemode_request_end = NULL;
-static api_call_return_int REAL_internal_gamemode_query_status = NULL;
-static api_call_return_cstring REAL_internal_gamemode_error_string = NULL;
-static api_call_pid_return_int REAL_internal_gamemode_request_start_for = NULL;
-static api_call_pid_return_int REAL_internal_gamemode_request_end_for = NULL;
-static api_call_pid_return_int REAL_internal_gamemode_query_status_for = NULL;
-
-/**
- * Internal helper to perform the symbol binding safely.
- *
- * Returns 0 on success and -1 on failure
- */
-__attribute__((always_inline)) static inline int internal_bind_libgamemode_symbol(
-    void *handle, const char *name, void **out_func, size_t func_size, bool required)
-{
-	void *symbol_lookup = NULL;
-	char *dl_error = NULL;
-
-	/* Safely look up the symbol */
-	symbol_lookup = dlsym(handle, name);
-	dl_error = dlerror();
-	if (required && (dl_error || !symbol_lookup)) {
-		snprintf(internal_gamemode_client_error_string,
-		         sizeof(internal_gamemode_client_error_string),
-		         "dlsym failed - %s",
-		         dl_error);
-		return -1;
-	}
-
-	/* Have the symbol correctly, copy it to make it usable */
-	memcpy(out_func, &symbol_lookup, func_size);
-	return 0;
-}
-
-/**
- * Loads libgamemode and needed functions
- *
- * Returns 0 on success and -1 on failure
- */
-__attribute__((always_inline)) static inline int internal_load_libgamemode(void)
-{
-	/* We start at 1, 0 is a success and -1 is a fail */
-	if (internal_libgamemode_loaded != 1) {
-		return internal_libgamemode_loaded;
-	}
-
-	/* Anonymous struct type to define our bindings */
-	struct binding {
-		const char *name;
-		void **functor;
-		size_t func_size;
-		bool required;
-	} bindings[] = {
-		{ "real_gamemode_request_start",
-		  (void **)&REAL_internal_gamemode_request_start,
-		  sizeof(REAL_internal_gamemode_request_start),
-		  true },
-		{ "real_gamemode_request_end",
-		  (void **)&REAL_internal_gamemode_request_end,
-		  sizeof(REAL_internal_gamemode_request_end),
-		  true },
-		{ "real_gamemode_query_status",
-		  (void **)&REAL_internal_gamemode_query_status,
-		  sizeof(REAL_internal_gamemode_query_status),
-		  false },
-		{ "real_gamemode_error_string",
-		  (void **)&REAL_internal_gamemode_error_string,
-		  sizeof(REAL_internal_gamemode_error_string),
-		  true },
-		{ "real_gamemode_request_start_for",
-		  (void **)&REAL_internal_gamemode_request_start_for,
-		  sizeof(REAL_internal_gamemode_request_start_for),
-		  false },
-		{ "real_gamemode_request_end_for",
-		  (void **)&REAL_internal_gamemode_request_end_for,
-		  sizeof(REAL_internal_gamemode_request_end_for),
-		  false },
-		{ "real_gamemode_query_status_for",
-		  (void **)&REAL_internal_gamemode_query_status_for,
-		  sizeof(REAL_internal_gamemode_query_status_for),
-		  false },
-	};
-
-	void *libgamemode = NULL;
-
-	/* Try and load libgamemode */
-	libgamemode = dlopen("libgamemode.so.0", RTLD_NOW);
-	if (!libgamemode) {
-		/* Attempt to load unversioned library for compatibility with older
-		 * versions (as of writing, there are no ABI changes between the two -
-		 * this may need to change if ever ABI-breaking changes are made) */
-		libgamemode = dlopen("libgamemode.so", RTLD_NOW);
-		if (!libgamemode) {
-			snprintf(internal_gamemode_client_error_string,
-			         sizeof(internal_gamemode_client_error_string),
-			         "dlopen failed - %s",
-			         dlerror());
-			internal_libgamemode_loaded = -1;
-			return -1;
-		}
-	}
-
-	/* Attempt to bind all symbols */
-	for (size_t i = 0; i < sizeof(bindings) / sizeof(bindings[0]); i++) {
-		struct binding *binder = &bindings[i];
-
-		if (internal_bind_libgamemode_symbol(libgamemode,
-		                                     binder->name,
-		                                     binder->functor,
-		                                     binder->func_size,
-		                                     binder->required)) {
-			internal_libgamemode_loaded = -1;
-			return -1;
-		};
-	}
-
-	/* Success */
-	internal_libgamemode_loaded = 0;
-	return 0;
-}
-
-/**
- * Redirect to the real libgamemode
- */
-__attribute__((always_inline)) static inline const char *gamemode_error_string(void)
-{
-	/* If we fail to load the system gamemode, or we have an error string already, return our error
-	 * string instead of diverting to the system version */
-	if (internal_load_libgamemode() < 0 || internal_gamemode_client_error_string[0] != '\0') {
-		return internal_gamemode_client_error_string;
-	}
-
-	/* Assert for static analyser that the function is not NULL */
-	assert(REAL_internal_gamemode_error_string != NULL);
-
-	return REAL_internal_gamemode_error_string();
-}
-
-/**
- * Redirect to the real libgamemode
- * Allow automatically requesting game mode
- * Also prints errors as they happen.
- */
-#ifdef GAMEMODE_AUTO
-__attribute__((constructor))
-#else
-__attribute__((always_inline)) static inline
-#endif
-int gamemode_request_start(void)
-{
-	/* Need to load gamemode */
-	if (internal_load_libgamemode() < 0) {
-#ifdef GAMEMODE_AUTO
-		fprintf(stderr, "gamemodeauto: %s\n", gamemode_error_string());
-#endif
-		return -1;
-	}
-
-	/* Assert for static analyser that the function is not NULL */
-	assert(REAL_internal_gamemode_request_start != NULL);
-
-	if (REAL_internal_gamemode_request_start() < 0) {
-#ifdef GAMEMODE_AUTO
-		fprintf(stderr, "gamemodeauto: %s\n", gamemode_error_string());
-#endif
-		return -1;
-	}
-
-	return 0;
-}
-
-/* Redirect to the real libgamemode */
-#ifdef GAMEMODE_AUTO
-__attribute__((destructor))
-#else
-__attribute__((always_inline)) static inline
-#endif
-int gamemode_request_end(void)
-{
-	/* Need to load gamemode */
-	if (internal_load_libgamemode() < 0) {
-#ifdef GAMEMODE_AUTO
-		fprintf(stderr, "gamemodeauto: %s\n", gamemode_error_string());
-#endif
-		return -1;
-	}
-
-	/* Assert for static analyser that the function is not NULL */
-	assert(REAL_internal_gamemode_request_end != NULL);
-
-	if (REAL_internal_gamemode_request_end() < 0) {
-#ifdef GAMEMODE_AUTO
-		fprintf(stderr, "gamemodeauto: %s\n", gamemode_error_string());
-#endif
-		return -1;
-	}
-
-	return 0;
-}
-
-/* Redirect to the real libgamemode */
-__attribute__((always_inline)) static inline int gamemode_query_status(void)
-{
-	/* Need to load gamemode */
-	if (internal_load_libgamemode() < 0) {
-		return -1;
-	}
-
-	if (REAL_internal_gamemode_query_status == NULL) {
-		snprintf(internal_gamemode_client_error_string,
-		         sizeof(internal_gamemode_client_error_string),
-		         "gamemode_query_status missing (older host?)");
-		return -1;
-	}
-
-	return REAL_internal_gamemode_query_status();
-}
-
-/* Redirect to the real libgamemode */
-__attribute__((always_inline)) static inline int gamemode_request_start_for(pid_t pid)
-{
-	/* Need to load gamemode */
-	if (internal_load_libgamemode() < 0) {
-		return -1;
-	}
-
-	if (REAL_internal_gamemode_request_start_for == NULL) {
-		snprintf(internal_gamemode_client_error_string,
-		         sizeof(internal_gamemode_client_error_string),
-		         "gamemode_request_start_for missing (older host?)");
-		return -1;
-	}
-
-	return REAL_internal_gamemode_request_start_for(pid);
-}
-
-/* Redirect to the real libgamemode */
-__attribute__((always_inline)) static inline int gamemode_request_end_for(pid_t pid)
-{
-	/* Need to load gamemode */
-	if (internal_load_libgamemode() < 0) {
-		return -1;
-	}
-
-	if (REAL_internal_gamemode_request_end_for == NULL) {
-		snprintf(internal_gamemode_client_error_string,
-		         sizeof(internal_gamemode_client_error_string),
-		         "gamemode_request_end_for missing (older host?)");
-		return -1;
-	}
-
-	return REAL_internal_gamemode_request_end_for(pid);
-}
-
-/* Redirect to the real libgamemode */
-__attribute__((always_inline)) static inline int gamemode_query_status_for(pid_t pid)
-{
-	/* Need to load gamemode */
-	if (internal_load_libgamemode() < 0) {
-		return -1;
-	}
-
-	if (REAL_internal_gamemode_query_status_for == NULL) {
-		snprintf(internal_gamemode_client_error_string,
-		         sizeof(internal_gamemode_client_error_string),
-		         "gamemode_query_status_for missing (older host?)");
-		return -1;
-	}
-
-	return REAL_internal_gamemode_query_status_for(pid);
-}
-
-#endif // CLIENT_GAMEMODE_H