.TH SCREATE 2 .SH NAME screate \- create a new semaphore .SH SYNOPSIS .nf .B int screate(count) .B int count; .fi .SH DESCRIPTION .I Screate creates a counting semaphore and initializes it to .I count. If successful, .I screate returns the integer identifier of the new semaphore. It returns SYSERR if no more semaphores can be allocated or if \f2count\f1 is less than zero. .PP Semaphores are manipulated with WAIT(2) and SIGNAL(2) to synchronize processes. Waiting causes the semaphore count to be decremented; decrementing a semaphore count past zero causes a process to be blocked. Signaling a semaphore increases its count, freeing a blocked process if one is waiting. .SH SEE ALSO scount(2), sdelete(2), signal(2), sreset(2), wait(2)