消息队列在linux下实现进程间的通信；消息盒子在单片机中的代码实现

消息队列是进程间通信的一种方式。
== 首先介绍下消息盒子在单片机中的代码实现==

#include<stdio.h>
struct message_t
{
	int integer;
	int decimal[32];
};
struct message_t message;

/** 32位位码 */
int  Bit_Map32[32] =
{
	0x00000001, 0x00000002, 0x00000004, 0x00000008,
	0x00000010, 0x00000020, 0x00000040, 0x00000080,
	0x00000100, 0x00000200, 0x00000400, 0x00000800,
	0x00001000, 0x00002000, 0x00004000, 0x00008000,
	0x00010000, 0x00020000, 0x00040000, 0x00080000,
	0x00100000, 0x00200000, 0x00400000, 0x00800000,
	0x01000000, 0x02000000, 0x04000000, 0x08000000,
	0x10000000, 0x20000000, 0x40000000, 0x80000000,
};
int put_message(int message_id)
{
	
	message.integer |= Bit_Map32[message_id / 32];
	message.decimal[message_id / 32] = message_id % 32;
}

int get_message(struct message_t *message)
{
	int message_id = 0;//消息号默认为0
	int temp = 0;
	int  i = 0;
	if (message->integer & 0xFF) //当有消息是都要处理。
	{	
		for (i = 0; i < 256; i++)
		{
			if (message->integer & Bit_Map32[i])
			{
				temp = i;
				temp <<= 5;
				message->integer &= ~Bit_Map32[i];
				return message_id = temp + message->decimal[i];
			}
		}
	}
	return message_id;
}


int main()
{
   int msg1 = 6;
   int msg2 = 254;
   int msg = 0;
   put_message(msg1);//输入消息号
   put_message(msg2);//输入消息号
   //输出所有的消息号
   while ((msg = get_message(&message)) != 0)
   {
	   printf("%d\n", msg);
   }
   system("pause");
   return 0;
}