CYGWIN support for threads, shared-memory, and other system calls

[David]

Hi,

I am new to CYGWIN API development and wanted to know if CYGWIN supports the 
following POSIX items before actually diving in.
1.  Threading (such as pthread_mutex_t, pthread_create, etc.)
2.  Shared Memory (shm_open, mmap, etc.)
3.  Semaphores (sem_init)
4.  Linux system calls (realpath)

Thanks,

David


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