Function popInterrupt

libctru/source/services/gspgpu.c:322–357

}

static int popInterrupt(void)
{
	int curEvt;
	bool strexFailed;
	u8* gspEventData = (u8*)gspSharedMem + gspThreadId*0x40;
	do {
		union {
			struct {
				u8 cur;
				u8 count;
				u8 err;
				u8 unused;
			};
			u32 as_u32;
		} header;

		// Do a load on all header fields as an atomic unit
		header.as_u32 = __ldrex((s32*)gspEventData);

		if (__builtin_expect(header.count == 0, 0)) {
			__clrex();
			return -1;
		}

		curEvt = gspEventData[0xC + header.cur];

		header.cur += 1;
		if (header.cur >= 0x34) header.cur -= 0x34;
		header.count -= 1;
		header.err = 0; // Should this really be set?

		strexFailed = __strex((s32*)gspEventData, header.as_u32);
	} while (__builtin_expect(strexFailed, 0));

	return curEvt;
}

// Dummy version to avoid linking in gxqueue.c if not actually used
__attribute__((weak)) void gxCmdQueueInterrupt(GSPGPU_Event irq)