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Ensure call-once semantics inside InitializeExtensions

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This commit is contained in:
John Firebaugh
2015-05-12 16:11:15 -07:00
parent a2344c36c3
commit 7d4f12434e
5 changed files with 44 additions and 62 deletions
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30
platform/default/headless_view.cpp
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@@ -13,8 +13,6 @@
#include <cstring>
#include <cassert>
pthread_once_t loadGLExtensions = PTHREAD_ONCE_INIT;
#ifdef MBGL_USE_CGL
#include <CoreFoundation/CoreFoundation.h>
#elif MBGL_USE_GLX
@@ -45,28 +43,26 @@ void HeadlessView::loadExtensions() {
return;
}
pthread_once(&loadGLExtensions, [] {
#ifdef MBGL_USE_CGL
gl::InitializeExtensions([](const char * name) {
static CFBundleRef framework = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengl"));
if (!framework) {
throw std::runtime_error("Failed to load OpenGL framework.");
}
gl::InitializeExtensions([](const char * name) {
static CFBundleRef framework = CFBundleGetBundleWithIdentifier(CFSTR("com.apple.opengl"));
if (!framework) {
throw std::runtime_error("Failed to load OpenGL framework.");
}
CFStringRef str = CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingASCII);
void* symbol = CFBundleGetFunctionPointerForName(framework, str);
CFRelease(str);
CFStringRef str = CFStringCreateWithCString(kCFAllocatorDefault, name, kCFStringEncodingASCII);
void* symbol = CFBundleGetFunctionPointerForName(framework, str);
CFRelease(str);
return reinterpret_cast<gl::glProc>(symbol);
});
return reinterpret_cast<gl::glProc>(symbol);
});
#endif
#ifdef MBGL_USE_GLX
gl::InitializeExtensions([](const char * name) {
return glXGetProcAddress(reinterpret_cast<const GLubyte *>(name));
});
#endif
gl::InitializeExtensions([](const char * name) {
return glXGetProcAddress(reinterpret_cast<const GLubyte *>(name));
});
#endif
extensionsLoaded = true;
}