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- Question: How the C++ avoid interleaved characters for cout
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How the C++ avoid interleaved characters for cout
In C++, the cout
object is an instance of the ostream
class, which provides a mechanism for sending data to an output stream. When data is sent to cout
, it is typically buffered before being sent to the actual output device (such as the console or a file).
To avoid interleaved characters when sending data to cout
, C++ uses a technique called “synchronization”. This means that when multiple threads or processes are trying to write to cout
simultaneously, they will take turns writing to the stream in a coordinated manner, rather than trying to write to it at the same time.
The synchronization mechanism used by cout
is implemented using a combination of locks and buffer management. When data is sent to cout
, it is first placed in a buffer. Once the buffer is full or a newline character is encountered, the buffer is flushed and the contents are sent to the output device. During this process, a lock is acquired to prevent other threads or processes from writing to cout
while the buffer is being flushed.
By using this synchronization mechanism, C++ is able to ensure that the output to cout
is written in a consistent and orderly fashion, even when multiple threads or processes are involved. This helps to prevent interleaved characters and other types of output corruption that can occur when multiple threads or processes try to write to the same output stream simultaneously.
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