?? upalloc.c
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/* upalloc.c - upalloc */#include <conf.h>#include <kernel.h>#include <proc.h>#include <network.h>#include <ports.h>/*------------------------------------------------------------------------ * upalloc - allocate a UDP port demultiplexing queue *------------------------------------------------------------------------ */intupalloc(void){ struct upq *pup; int i; wait(udpmutex); for (i=0 ; i<UPPS ; i++) { pup = &upqs[i]; if (!pup->up_valid) { pup->up_valid = TRUE; pup->up_port = 0; pup->up_pid = BADPID; pup->up_xport = pcreate(UPPLEN); signal(udpmutex); return i; } } signal(udpmutex); return SYSERR;}struct upq upqs[UPPS];
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