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xenia-canary/third_party/vulkan/loader/vk_loader_platform.h

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/*
*
* Copyright (c) 2015-2016 The Khronos Group Inc.
* Copyright (c) 2015-2016 Valve Corporation
* Copyright (c) 2015-2016 LunarG, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Author: Ian Elliot <ian@lunarg.com>
* Author: Jon Ashburn <jon@lunarg.com>
*
*/
#pragma once
#if defined(_WIN32)
// WinSock2.h must be included *BEFORE* windows.h
#include <WinSock2.h>
#endif // _WIN32
#include "vulkan/vk_platform.h"
#include "vulkan/vk_sdk_platform.h"
#if defined(__linux__)
/* Linux-specific common code: */
// Headers:
//#define _GNU_SOURCE 1
// TBD: Are the contents of the following file used?
#include <unistd.h>
// Note: The following file is for dynamic loading:
#include <dlfcn.h>
#include <pthread.h>
#include <assert.h>
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#include <libgen.h>
// VK Library Filenames, Paths, etc.:
#define PATH_SEPERATOR ':'
#define DIRECTORY_SYMBOL '/'
#define VULKAN_DIR "/vulkan/"
#define VULKAN_ICDCONF_DIR "icd.d"
#define VULKAN_ICD_DIR "icd"
#define VULKAN_ELAYERCONF_DIR "explicit_layer.d"
#define VULKAN_ILAYERCONF_DIR "implicit_layer.d"
#define VULKAN_LAYER_DIR "layer"
#if defined(EXTRASYSCONFDIR)
#define EXTRA_DRIVERS_SYSCONFDIR_INFO ":" \
EXTRASYSCONFDIR VULKAN_DIR VULKAN_ICDCONF_DIR
#define EXTRA_ELAYERS_SYSCONFDIR_INFO ":" \
EXTRASYSCONFDIR VULKAN_DIR VULKAN_ELAYERCONF_DIR
#define EXTRA_ILAYERS_SYSCONFDIR_INFO ":" \
EXTRASYSCONFDIR VULKAN_DIR VULKAN_ILAYERCONF_DIR
#else
#define EXTRA_DRIVERS_SYSCONFDIR_INFO
#define EXTRA_ELAYERS_SYSCONFDIR_INFO
#define EXTRA_ILAYERS_SYSCONFDIR_INFO
#endif
#if defined(EXTRADATADIR)
#define EXTRA_DRIVERS_DATADIR_INFO ":" \
EXTRADATADIR VULKAN_DIR VULKAN_ICDCONF_DIR
#define EXTRA_ELAYERS_DATADIR_INFO ":" \
EXTRADATADIR VULKAN_DIR VULKAN_ELAYERCONF_DIR
#define EXTRA_ILAYERS_DATADIR_INFO ":" \
EXTRADATADIR VULKAN_DIR VULKAN_ILAYERCONF_DIR
#else
#define EXTRA_DRIVERS_DATADIR_INFO
#define EXTRA_ELAYERS_DATADIR_INFO
#define EXTRA_ILAYERS_DATADIR_INFO
#endif
#define DEFAULT_VK_DRIVERS_INFO \
SYSCONFDIR VULKAN_DIR VULKAN_ICDCONF_DIR ":" \
DATADIR VULKAN_DIR VULKAN_ICDCONF_DIR \
EXTRA_DRIVERS_SYSCONFDIR_INFO \
EXTRA_DRIVERS_DATADIR_INFO
#define DEFAULT_VK_ELAYERS_INFO \
SYSCONFDIR VULKAN_DIR VULKAN_ELAYERCONF_DIR ":" \
DATADIR VULKAN_DIR VULKAN_ELAYERCONF_DIR \
EXTRA_ELAYERS_SYSCONFDIR_INFO \
EXTRA_ELAYERS_DATADIR_INFO
#define DEFAULT_VK_ILAYERS_INFO \
SYSCONFDIR VULKAN_DIR VULKAN_ILAYERCONF_DIR ":" \
DATADIR VULKAN_DIR VULKAN_ILAYERCONF_DIR \
EXTRA_ILAYERS_SYSCONFDIR_INFO \
EXTRA_ILAYERS_DATADIR_INFO
#define DEFAULT_VK_DRIVERS_PATH ""
#define DEFAULT_VK_LAYERS_PATH ""
#if !defined(LAYERS_SOURCE_PATH)
#define LAYERS_SOURCE_PATH NULL
#endif
#define LAYERS_PATH_ENV "VK_LAYER_PATH"
#define HOME_VK_DRIVERS_INFO VULKAN_DIR VULKAN_ICDCONF_DIR
#define HOME_VK_ELAYERS_INFO VULKAN_DIR VULKAN_ELAYERCONF_DIR
#define HOME_VK_ILAYERS_INFO VULKAN_DIR VULKAN_ILAYERCONF_DIR
// C99:
#define PRINTF_SIZE_T_SPECIFIER "%zu"
// File IO
static inline bool loader_platform_file_exists(const char *path) {
if (access(path, F_OK))
return false;
else
return true;
}
static inline bool loader_platform_is_path_absolute(const char *path) {
if (path[0] == '/')
return true;
else
return false;
}
static inline char *loader_platform_dirname(char *path) {
return dirname(path);
}
// Dynamic Loading of libraries:
typedef void *loader_platform_dl_handle;
static inline loader_platform_dl_handle
loader_platform_open_library(const char *libPath) {
return dlopen(libPath, RTLD_LAZY | RTLD_LOCAL);
}
static inline const char *
loader_platform_open_library_error(const char *libPath) {
return dlerror();
}
static inline void
loader_platform_close_library(loader_platform_dl_handle library) {
dlclose(library);
}
static inline void *
loader_platform_get_proc_address(loader_platform_dl_handle library,
const char *name) {
assert(library);
assert(name);
return dlsym(library, name);
}
static inline const char *
loader_platform_get_proc_address_error(const char *name) {
return dlerror();
}
// Threads:
typedef pthread_t loader_platform_thread;
#define THREAD_LOCAL_DECL __thread
#define LOADER_PLATFORM_THREAD_ONCE_DECLARATION(var) \
pthread_once_t var = PTHREAD_ONCE_INIT;
#define LOADER_PLATFORM_THREAD_ONCE_DEFINITION(var) pthread_once_t var;
static inline void loader_platform_thread_once(pthread_once_t *ctl,
void (*func)(void)) {
assert(func != NULL);
assert(ctl != NULL);
pthread_once(ctl, func);
}
// Thread IDs:
typedef pthread_t loader_platform_thread_id;
static inline loader_platform_thread_id loader_platform_get_thread_id() {
return pthread_self();
}
// Thread mutex:
typedef pthread_mutex_t loader_platform_thread_mutex;
static inline void
loader_platform_thread_create_mutex(loader_platform_thread_mutex *pMutex) {
pthread_mutex_init(pMutex, NULL);
}
static inline void
loader_platform_thread_lock_mutex(loader_platform_thread_mutex *pMutex) {
pthread_mutex_lock(pMutex);
}
static inline void
loader_platform_thread_unlock_mutex(loader_platform_thread_mutex *pMutex) {
pthread_mutex_unlock(pMutex);
}
static inline void
loader_platform_thread_delete_mutex(loader_platform_thread_mutex *pMutex) {
pthread_mutex_destroy(pMutex);
}
typedef pthread_cond_t loader_platform_thread_cond;
static inline void
loader_platform_thread_init_cond(loader_platform_thread_cond *pCond) {
pthread_cond_init(pCond, NULL);
}
static inline void
loader_platform_thread_cond_wait(loader_platform_thread_cond *pCond,
loader_platform_thread_mutex *pMutex) {
pthread_cond_wait(pCond, pMutex);
}
static inline void
loader_platform_thread_cond_broadcast(loader_platform_thread_cond *pCond) {
pthread_cond_broadcast(pCond);
}
#define loader_stack_alloc(size) alloca(size)
#elif defined(_WIN32) // defined(__linux__)
/* Windows-specific common code: */
// WinBase.h defines CreateSemaphore and synchapi.h defines CreateEvent
// undefine them to avoid conflicts with VkLayerDispatchTable struct members.
#ifdef CreateSemaphore
#undef CreateSemaphore
#endif
#ifdef CreateEvent
#undef CreateEvent
#endif
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <io.h>
#include <stdbool.h>
#include <shlwapi.h>
#ifdef __cplusplus
#include <iostream>
#include <string>
using namespace std;
#endif // __cplusplus
// VK Library Filenames, Paths, etc.:
#define PATH_SEPERATOR ';'
#define DIRECTORY_SYMBOL '\\'
#define DEFAULT_VK_REGISTRY_HIVE HKEY_LOCAL_MACHINE
#define DEFAULT_VK_DRIVERS_INFO "SOFTWARE\\Khronos\\" API_NAME "\\Drivers"
#define DEFAULT_VK_DRIVERS_PATH ""
#define DEFAULT_VK_ELAYERS_INFO "SOFTWARE\\Khronos\\" API_NAME "\\ExplicitLayers"
#define DEFAULT_VK_ILAYERS_INFO "SOFTWARE\\Khronos\\" API_NAME "\\ImplicitLayers"
#if !defined(DEFAULT_VK_LAYERS_PATH)
#define DEFAULT_VK_LAYERS_PATH ""
#endif
#if !defined(LAYERS_SOURCE_PATH)
#define LAYERS_SOURCE_PATH NULL
#endif
#define LAYERS_PATH_ENV "VK_LAYER_PATH"
#define HOME_VK_DRIVERS_INFO ""
#define HOME_VK_ELAYERS_INFO ""
#define HOME_VK_ILAYERS_INFO ""
#define PRINTF_SIZE_T_SPECIFIER "%Iu"
// File IO
static bool loader_platform_file_exists(const char *path) {
if ((_access(path, 0)) == -1)
return false;
else
return true;
}
static bool loader_platform_is_path_absolute(const char *path) {
return !PathIsRelative(path);
}
// WIN32 runtime doesn't have dirname().
static inline char *loader_platform_dirname(char *path) {
char *current, *next;
// TODO/TBD: Do we need to deal with the Windows's ":" character?
for (current = path; *current != '\0'; current = next) {
next = strchr(current, DIRECTORY_SYMBOL);
if (next == NULL) {
if (current != path)
*(current - 1) = '\0';
return path;
} else {
// Point one character past the DIRECTORY_SYMBOL:
next++;
}
}
return path;
}
// WIN32 runtime doesn't have basename().
// Microsoft also doesn't have basename(). Paths are different on Windows, and
// so this is just a temporary solution in order to get us compiling, so that we
// can test some scenarios, and develop the correct solution for Windows.
// TODO: Develop a better, permanent solution for Windows, to replace this
// temporary code:
static char *loader_platform_basename(char *pathname) {
char *current, *next;
// TODO/TBD: Do we need to deal with the Windows's ":" character?
for (current = pathname; *current != '\0'; current = next) {
next = strchr(current, DIRECTORY_SYMBOL);
if (next == NULL) {
// No more DIRECTORY_SYMBOL's so return p:
return current;
} else {
// Point one character past the DIRECTORY_SYMBOL:
next++;
}
}
// We shouldn't get to here, but this makes the compiler happy:
return current;
}
// Dynamic Loading:
typedef HMODULE loader_platform_dl_handle;
static loader_platform_dl_handle
loader_platform_open_library(const char *libPath) {
return LoadLibrary(libPath);
}
static char *loader_platform_open_library_error(const char *libPath) {
static char errorMsg[164];
snprintf(errorMsg, 163, "Failed to open dynamic library \"%s\"", libPath);
return errorMsg;
}
static void loader_platform_close_library(loader_platform_dl_handle library) {
FreeLibrary(library);
}
static void *loader_platform_get_proc_address(loader_platform_dl_handle library,
const char *name) {
assert(library);
assert(name);
return GetProcAddress(library, name);
}
static char *loader_platform_get_proc_address_error(const char *name) {
static char errorMsg[120];
snprintf(errorMsg, 119, "Failed to find function \"%s\" in dynamic library",
name);
return errorMsg;
}
// Threads:
typedef HANDLE loader_platform_thread;
#define THREAD_LOCAL_DECL __declspec(thread)
#define LOADER_PLATFORM_THREAD_ONCE_DECLARATION(var) \
INIT_ONCE var = INIT_ONCE_STATIC_INIT;
#define LOADER_PLATFORM_THREAD_ONCE_DEFINITION(var) INIT_ONCE var;
static BOOL CALLBACK
InitFuncWrapper(PINIT_ONCE InitOnce, PVOID Parameter, PVOID *Context) {
void (*func)(void) = (void (*)(void))Parameter;
func();
return TRUE;
}
static void loader_platform_thread_once(void *ctl, void (*func)(void)) {
assert(func != NULL);
assert(ctl != NULL);
InitOnceExecuteOnce((PINIT_ONCE)ctl, InitFuncWrapper, func, NULL);
}
// Thread IDs:
typedef DWORD loader_platform_thread_id;
static loader_platform_thread_id loader_platform_get_thread_id() {
return GetCurrentThreadId();
}
// Thread mutex:
typedef CRITICAL_SECTION loader_platform_thread_mutex;
static void
loader_platform_thread_create_mutex(loader_platform_thread_mutex *pMutex) {
InitializeCriticalSection(pMutex);
}
static void
loader_platform_thread_lock_mutex(loader_platform_thread_mutex *pMutex) {
EnterCriticalSection(pMutex);
}
static void
loader_platform_thread_unlock_mutex(loader_platform_thread_mutex *pMutex) {
LeaveCriticalSection(pMutex);
}
static void
loader_platform_thread_delete_mutex(loader_platform_thread_mutex *pMutex) {
DeleteCriticalSection(pMutex);
}
typedef CONDITION_VARIABLE loader_platform_thread_cond;
static void
loader_platform_thread_init_cond(loader_platform_thread_cond *pCond) {
InitializeConditionVariable(pCond);
}
static void
loader_platform_thread_cond_wait(loader_platform_thread_cond *pCond,
loader_platform_thread_mutex *pMutex) {
SleepConditionVariableCS(pCond, pMutex, INFINITE);
}
static void
loader_platform_thread_cond_broadcast(loader_platform_thread_cond *pCond) {
WakeAllConditionVariable(pCond);
}
// Windows Registry:
char *loader_get_registry_string(const HKEY hive, const LPCTSTR sub_key,
const char *value);
#define loader_stack_alloc(size) _alloca(size)
#else // defined(_WIN32)
#error The "loader_platform.h" file must be modified for this OS.
// NOTE: In order to support another OS, an #elif needs to be added (above the
// "#else // defined(_WIN32)") for that OS, and OS-specific versions of the
// contents of this file must be created.
// NOTE: Other OS-specific changes are also needed for this OS. Search for
// files with "WIN32" in it, as a quick way to find files that must be changed.
#endif // defined(_WIN32)
// returns true if the given string appears to be a relative or absolute
// path, as opposed to a bare filename.
static inline bool loader_platform_is_path(const char *path) {
return strchr(path, DIRECTORY_SYMBOL) != NULL;
}
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