POSIX.1b and POSIX.1c – real-time and thread extensions

POSIX.1b focuses on real-time applications and on applications that need high performance. It focus on these aspects:

• Priority scheduling
• Real-time signals
• Clocks and timers
• Semaphores
• Message passing
• Shared memory
• Asynchronous and synchronous I/O
• Memory locking interface

POSIX.1c introduces the multithread paradigm and defines the following:

• Thread creation, control, and cleanup
• Thread scheduling
• Thread synchronization
• Signal handling