MacOS GPU support

src/detection/gpu/gpu_apple.c

@@ -1,6 +1,52 @@
 #include "gpu.h"
+#include "common/library.h"
+
+#include <CoreFoundation/CoreFoundation.h>
+#include <IOKit/graphics/IOGraphicsLib.h>
 
 void ffDetectGPUImpl(FFlist* gpus, const FFinstance* instance)
 {
-    FF_UNUSED(gpus, instance);
+    FF_UNUSED(instance);
+
+    void* iokit = dlopen("/System/Library/Frameworks/IOKit.framework/IOKit", RTLD_LAZY);
+    if(iokit == NULL)
+        return;
+
+    FF_LIBRARY_LOAD_SYMBOL(iokit, IOServiceMatching, )
+    FF_LIBRARY_LOAD_SYMBOL(iokit, IOServiceGetMatchingServices, )
+    FF_LIBRARY_LOAD_SYMBOL(iokit, kIOMasterPortDefault, )
+    FF_LIBRARY_LOAD_SYMBOL(iokit, IOIteratorNext, )
+    FF_LIBRARY_LOAD_SYMBOL(iokit, IORegistryEntryGetName, )
+    FF_LIBRARY_LOAD_SYMBOL(iokit, IOObjectRelease, )
+
+    CFMutableDictionaryRef matchDict = ffIOServiceMatching(kIOAcceleratorClassName);
+    io_iterator_t iterator;
+    if(ffIOServiceGetMatchingServices(*ffkIOMasterPortDefault, matchDict, &iterator) != kIOReturnSuccess)
+    {
+        dlclose(iokit);
+        return;
+    }
+
+    io_registry_entry_t registryEntry;
+    while((registryEntry = ffIOIteratorNext(iterator)) != 0)
+    {
+        io_name_t deviceName;
+        kern_return_t ret = ffIORegistryEntryGetName(registryEntry, deviceName);
+        ffIOObjectRelease(registryEntry);
+
+        if(ret != KERN_SUCCESS)
+            continue;
+
+        FFGPUResult* gpu = ffListAdd(gpus);
+
+        ffStrbufInit(&gpu->name);
+        ffStrbufAppendS(&gpu->name, deviceName);
+
+        ffStrbufInitA(&gpu->vendor, 0);
+        ffStrbufInitA(&gpu->driver, 0);
+        gpu->temperature = FF_GPU_TEMP_UNSET;
+    }
+
+    ffIOObjectRelease(iterator);
+    dlclose(iokit);
 }