ring_buf

[NanoPangBZ]

描述bug
当read的数量大于ring_buf当前的数值是会有bug

重现步骤

//初始化
port1 = new CSerialPort;
port1->init( "COM2" , 256000 );
port1->setOperateMode(AsynchronousOperate);
port1->setReadBufferSize(1024);
port1->setReadIntervalTimeout(0);
port1->open();

//自己的额外的接收线程
static void* port1_across_impl(void* args)
{
uint8_t buf[1024];
int read_cnt;
int write_cnt;
int writed_cnt;
while(1)
{
read_cnt = port1->readData( buf , 12 );
if( read_cnt != 0 )
{
std::cout<<read_cnt<<std::endl;
}
}
pthread_exit(NULL);
}

//外围设备向port1发送"12341241234132421342314\r\n"之后便没有后续发送了，但是readData函数仍然返回12，断点查看 ibuffer.hpp中的read方法发现m_head一直在增长

运行环境信息:

• 操作系统: win 11
• 编译器:x86_64-w64-mingw32

[itas109]

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