--- a/TaskManager/kernel/ppe/CpuThreads.cc	Tue Jun 07 17:55:20 2011 +0900
+++ b/TaskManager/kernel/ppe/CpuThreads.cc	Tue Jun 07 18:07:57 2011 +0900
@@ -25,6 +25,9 @@
 
     delete [] threads;
     delete [] args;
+
+	/* セマフォ変数の破棄 */
+	sem_destroy(&sem);
 }
 
 void *
@@ -60,6 +63,11 @@
 	pthread_create(&threads[i], NULL,
 		       &cpu_thread_run, (void*)&args[i]);
     }
+	/* セマフォ変数の定義 */
+	sem_t sem;
+
+	/* セマフォ変数の初期化 */
+	sem_init(&sem, 0, 1);
 }
 
 /**
@@ -74,7 +82,9 @@
 CpuThreads::get_mail(int cpuid, int count, memaddr *ret)
 {   
     // need synchronization
+	sem_wait(&sem);
     *ret = args[cpuid-id_offset].scheduler->mail_read_from_host();
+	sem_post(&sem);
     return 1;
 }
 
@@ -82,7 +92,9 @@
 CpuThreads::has_mail(int cpuid, int count, memaddr *ret)
 {
     // need synchronization
+	sem_wait(&sem);
     return  args[cpuid-id_offset].scheduler->has_mail_from_host();
+	sem_post(&sem);
 }
 
 /**
@@ -104,7 +116,9 @@
 
 {
     // need synchronization
+	sem_wait(&sem);
     args[cpuid-id_offset].scheduler->mail_write_from_host(*data);
+	sem_post(&sem);
 }