fix mutex aquire order

src/cpu/rv32cpu.c

@@ -650,11 +650,11 @@ void cpu_loop(rv32_cpu_t* cpu)
 	{
 		// Aquire CPU and memory mutex
 		pthread_mutex_lock(&cpu0_mutex);
-		pthread_mutex_lock(&memory_mutex);
-
 		while(!cpu->sim_ticks_left)
 			pthread_cond_wait(&cpu0->sim_condition, &cpu0_mutex);
 
+		pthread_mutex_lock(&memory_mutex);
+
 		// Fetch
 		raw_instruction_t raw_instruction;
 		if(cpu->pc > memory_size - 4)
@@ -685,8 +685,8 @@ void cpu_loop(rv32_cpu_t* cpu)
 			cpu->sim_ticks_left--;
 
 		// Let go of cpu and memory mutex
-		pthread_mutex_unlock(&cpu0_mutex);
 		pthread_mutex_unlock(&memory_mutex);
+		pthread_mutex_unlock(&cpu0_mutex);
 	}
 }