152 lines
2.4 KiB
C
152 lines
2.4 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <libc.h>
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#include <thread.h>
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#include "threadimpl.h"
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int
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threadid(void)
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{
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return _threadgetproc()->thread->id;
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}
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int
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threadpid(int id)
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{
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int pid;
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Proc *p;
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Thread *t;
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if (id < 0)
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return -1;
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if (id == 0)
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return _threadgetproc()->pid;
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jehanne_lock(&_threadpq.lock);
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for (p = _threadpq.head; p; p = p->next){
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jehanne_lock(&p->lock);
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for (t = p->threads.head; t; t = t->nextt)
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if (t->id == id){
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pid = p->pid;
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jehanne_unlock(&p->lock);
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jehanne_unlock(&_threadpq.lock);
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return pid;
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}
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jehanne_unlock(&p->lock);
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}
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jehanne_unlock(&_threadpq.lock);
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return -1;
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}
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int
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threadsetgrp(int ng)
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{
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int og;
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Thread *t;
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t = _threadgetproc()->thread;
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og = t->grp;
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t->grp = ng;
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return og;
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}
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int
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threadgetgrp(void)
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{
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return _threadgetproc()->thread->grp;
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}
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void
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threadsetname(char *fmt, ...)
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{
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int fd;
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char buf[128];
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va_list arg;
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Proc *p;
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Thread *t;
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p = _threadgetproc();
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t = p->thread;
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if (t->cmdname)
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jehanne_free(t->cmdname);
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va_start(arg, fmt);
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t->cmdname = jehanne_vsmprint(fmt, arg);
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va_end(arg);
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if(t->cmdname && p->nthreads == 1){
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jehanne_snprint(buf, sizeof buf, "#p/%lud/args", jehanne_getpid());
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if((fd = sys_open(buf, OWRITE)) >= 0){
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jehanne_write(fd, t->cmdname, jehanne_strlen(t->cmdname)+1);
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sys_close(fd);
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}
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}
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}
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char*
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threadgetname(void)
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{
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Proc *p;
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if((p = _threadgetproc()) && p->thread)
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return p->thread->cmdname;
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return nil;
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}
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void**
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threaddata(void)
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{
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return &_threadgetproc()->thread->udata[0];
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}
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void**
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_workerdata(void)
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{
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return &_threadgetproc()->wdata;
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}
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void**
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procdata(void)
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{
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return &_threadgetproc()->udata;
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}
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static Lock privlock;
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static int privmask = 1;
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int
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tprivalloc(void)
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{
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int i;
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jehanne_lock(&privlock);
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for(i=0; i<NPRIV; i++)
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if(!(privmask&(1<<i))){
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privmask |= 1<<i;
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jehanne_unlock(&privlock);
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return i;
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}
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jehanne_unlock(&privlock);
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return -1;
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}
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void
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tprivfree(int i)
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{
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if(i < 0 || i >= NPRIV)
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abort();
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jehanne_lock(&privlock);
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privmask &= ~(1<<i);
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}
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void**
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tprivaddr(int i)
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{
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return &_threadgetproc()->thread->udata[i];
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}
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