kotatogram/cmake_helpers
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Fix libwayland loader.

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This commit is contained in:
John Preston 2021-05-10 14:38:07 +04:00
parent c8341354e1
commit 9a8fc7b7cb
1 changed files with 46 additions and 13 deletions
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59
linux_wayland_helper/linux_wayland_helper.cpp
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@ -11,6 +11,8 @@
#include <wayland-egl.h> #include <wayland-egl.h>
#include <wayland-cursor.h> #include <wayland-cursor.h>
#include <iostream>
#define LOAD_SYMBOL(handle, func) LoadSymbol(handle, #func, func) #define LOAD_SYMBOL(handle, func) LoadSymbol(handle, #func, func)
namespace Wayland { namespace Wayland {
@ -171,27 +173,58 @@ void wl_argument_from_va_list(
} }
} }
bool LoadLibrary(void **handle, const char *name) { using Handle = void*;
*handle = dlopen(name, RTLD_LAZY | RTLD_NODELETE);
if (!*handle) { bool LoadLibrary(Handle &handle, const char *name) {
g_warning("Could not load '%s': %s", name, dlerror()); handle = dlopen(name, RTLD_LAZY | RTLD_NODELETE);
if (handle) {
std::cout << "Loaded library '" << name << "'." << std::endl;
return true;
} }
return (*handle != nullptr); const auto error = dlerror();
g_warning("Could not load library '%s': %s", name, error);
std::cerr
<< "Could not load library '"
<< name
<< "', error: '"
<< error
<< "'."
<< std::endl;
return false;
} }
template <typename Function> template <typename Function>
inline bool LoadSymbol(void *handle, const char *name, Function &func) { inline bool LoadSymbol(Handle handle, const char *name, Function &func) {
func = reinterpret_cast<Function>(dlsym(handle, name)); func = handle
? reinterpret_cast<Function>(dlsym(handle, name))
: nullptr;
if (const auto error = dlerror()) { if (const auto error = dlerror()) {
g_warning("Failed to load '%1' function: %2", name, error); g_warning("Failed to load function '%s': %s", name, error);
std::cerr
<< "Could not load function '"
<< name
<< "', error: '"
<< error
<< "'."
<< std::endl;
} else if (handle && !func) {
std::cerr
<< "Could not load function '"
<< name
<< "', error unknown."
<< std::endl;
} else if (func) {
std::cout << "Loaded function '" << name << "'." << std::endl;
} }
return (func != nullptr); return (func != nullptr);
} }
bool Resolve() { bool Resolve() {
static const auto loaded = [&] { static const auto loaded = [&] {
void *egl, *cursor, *client = nullptr; auto egl = Handle();
gsl::finally([&] { auto cursor = Handle();
auto client = Handle();
const auto guard = gsl::finally([&] {
if (egl) { if (egl) {
dlclose(egl); dlclose(egl);
} }
@ -202,18 +235,18 @@ bool Resolve() {
dlclose(client); dlclose(client);
} }
}); });
return LoadLibrary(&egl, "libwayland-egl.so.1") return LoadLibrary(egl, "libwayland-egl.so.1")
&& LOAD_SYMBOL(egl, wl_egl_window_create) && LOAD_SYMBOL(egl, wl_egl_window_create)
&& LOAD_SYMBOL(egl, wl_egl_window_destroy) && LOAD_SYMBOL(egl, wl_egl_window_destroy)
&& LOAD_SYMBOL(egl, wl_egl_window_resize) && LOAD_SYMBOL(egl, wl_egl_window_resize)
&& LOAD_SYMBOL(egl, wl_egl_window_get_attached_size) && LOAD_SYMBOL(egl, wl_egl_window_get_attached_size)
&& LoadLibrary(&cursor, "libwayland-cursor.so.0") && LoadLibrary(cursor, "libwayland-cursor.so.0")
&& LOAD_SYMBOL(cursor, wl_cursor_image_get_buffer) && LOAD_SYMBOL(cursor, wl_cursor_image_get_buffer)
&& LOAD_SYMBOL(cursor, wl_cursor_theme_load) && LOAD_SYMBOL(cursor, wl_cursor_theme_load)
&& LOAD_SYMBOL(cursor, wl_cursor_theme_destroy) && LOAD_SYMBOL(cursor, wl_cursor_theme_destroy)
&& LOAD_SYMBOL(cursor, wl_cursor_theme_get_cursor) && LOAD_SYMBOL(cursor, wl_cursor_theme_get_cursor)
&& LOAD_SYMBOL(cursor, wl_cursor_frame_and_duration) && LOAD_SYMBOL(cursor, wl_cursor_frame_and_duration)
&& LoadLibrary(&client, "libwayland-client.so.0") && LoadLibrary(client, "libwayland-client.so.0")
&& LOAD_SYMBOL(client, wl_proxy_destroy) && LOAD_SYMBOL(client, wl_proxy_destroy)
&& LOAD_SYMBOL(client, wl_proxy_get_version) && LOAD_SYMBOL(client, wl_proxy_get_version)
&& LOAD_SYMBOL(client, wl_array_init) && LOAD_SYMBOL(client, wl_array_init)