Linux IPCs, or Inter-Process Communications, are tools and techniques in the Linux operating system that allow different processes to talk to each other. Think of them like the postal service of a computer; they help different programs send and receive messages or data.
Let’s take a look at a few of them
𝑷𝒊𝒑𝒆𝒔: A one-way street for data, mostly between parent-child processes.
𝑭𝒊𝒇𝒐 (Named Pipe): This is like a pipe, but with a name, allowing even unrelated processes to talk.
𝑴𝒆𝒔𝒔𝒂𝒈𝒆 𝑸𝒖𝒆𝒖𝒆: Think of it like a mailbox. Processes can drop and pick messages, even in order of priority.
𝑺𝒉𝒂𝒓𝒆𝒅 𝑴𝒆𝒎𝒐𝒓𝒚: A communal space where processes share data. It’s super fast but needs careful coordination.
𝑫𝒂𝒕𝒂 𝑮𝒓𝒂𝒎: Uses UDP. It’s a bit carefree; doesn’t always ensure the message reaches.
𝑺𝒕𝒓𝒆𝒂𝒎 𝑺𝒐𝒄𝒌𝒆𝒕𝒔: Uses TCP. More responsible, ensures the message gets through.
𝑺𝒊𝒈𝒏𝒂𝒍𝒔: These are like alarms. They notify processes of events.
𝑭𝒊𝒍𝒆-𝒃𝒂𝒔𝒆𝒅 𝑪𝒐𝒎𝒎𝒖𝒏𝒊𝒄𝒂𝒕𝒊𝒐𝒏: Just like it sounds, processes talk by reading and writing to a file.
𝑩𝒊𝒏𝒂𝒓𝒚 𝑺𝒆𝒎𝒂𝒑𝒉𝒐𝒓𝒆: A simple yes/no (0 or 1) flag.
𝑪𝒐𝒖𝒏𝒕𝒊𝒏𝒈 𝑺𝒆𝒎𝒂𝒑𝒉𝒐𝒓𝒆: A more nuanced semaphore that can count up or down.
𝑹𝒆𝒄𝒐𝒓𝒅 𝑳𝒐𝒄𝒌: Locks a piece of a file so others can’t touch it.
𝑺𝒕𝒂𝒏𝒅𝒂𝒓𝒅 𝑴𝒖𝒕𝒆𝒙: Ensures only one at a time access.
𝑹𝒆𝒄𝒖𝒓𝒔𝒊𝒗𝒆 𝑴𝒖𝒕𝒆𝒙: A mutex that’s forgiving, lets a process lock something it’s already locked.
𝑭𝒖𝒕𝒆𝒙𝒆𝒔: Super fast, prefers to keep things in user-space.
𝑪𝒐𝒏𝒅𝒊𝒕𝒊𝒐𝒏 𝑽𝒂𝒓𝒊𝒂𝒃𝒍𝒆𝒔: Makes a process wait until a condition is met.
𝑩𝒂𝒓𝒓𝒊𝒆𝒓𝒔: Like a checkpoint in a relay race, ensures all processes reach a point before moving on.
𝑺𝒑𝒊𝒏𝒍𝒐𝒄𝒌𝒔: A process waits by, well, spinning, until it gets a lock. Great for short waits.
𝑫𝒆𝒂𝒅𝒍𝒐𝒄𝒌 𝑷𝒓𝒐𝒕𝒐𝒄𝒐𝒍𝒔: Safety mechanisms to ensure processes don’t wait forever.
𝑴𝒐𝒏𝒊𝒕𝒐𝒓𝒔: A sophisticated tool ensuring only one process enters a segment and can wait for conditions.
𝑹𝒆𝒂𝒅-𝑾𝒓𝒊𝒕𝒆 𝑳𝒐𝒄𝒌𝒔: Allows many to read, but only one to write.
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An Article by: Yashwanth Naidu Tikkisetty
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