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59 lines
1.8 KiB
C
59 lines
1.8 KiB
C
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/*
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* Ports IPC
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*
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* This file is non-BSD.
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*/
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#ifndef _SYS_PORTS_H_
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#define _SYS_PORTS_H_
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#ifdef KERNEL
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#define NPORTS 30 /* maximum number of ports */
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#define MAXMSGS 100 /* maximum messages on all ports*/
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#define PTFREE 1 /* port is free */
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#define PTLIMBO 2 /* port is being deleted/reset */
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#define PTALLOC 3 /* port is allocated */
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#define PTEMPTY -1 /* initial semaphore entries */
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#define PTUNNAMED NULL /* port has not been bound */
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struct ptnode { /* node on list of message ptrs */
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long int ptmsg; /* a one-word message */
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struct ptnode *ptnext; /* address of next node on list */
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};
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struct pt { /* entry in the port table */
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int ptstate; /* port state (FREE/LIMBO/ALLOC)*/
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char *ptname; /* name bound to port */
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int ptssem; /* sender semaphore */
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int ptrsem; /* receiver semaphore */
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int ptmaxcnt; /* max messages to be queued */
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int ptseq; /* sequence changed at creation */
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struct ptnode *pthead; /* list of message pointers */
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struct ptnode *pttail; /* tail of message list */
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};
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extern struct ptnode *ptfree; /* list of free nodes */
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extern struct pt ports[]; /* port table */
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extern int ptnextp; /* next port to examine when */
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/* looking for a free one */
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#define isbadport(portid) ( (portid) < 0 || (portid)>=NPORTS )
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#endif /* KERNEL */
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#ifndef _SYS_CDEFS_H_
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#include <sys/cdefs.h>
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#endif
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int pcreate __P((int count));
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int psend __P((int portid, long msg));
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long preceive __P((int portid));
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int pdelete __P((int portid, int (*dispose)(long)));
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int preset __P((int portid, int (*dispose)(long)));
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int pbind __P((int portid, const char *name));
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int pgetport __P((const char *name));
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int pgetcount __P((int portid));
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#endif /* _SYS_PORTS_H_ */
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