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https://github.com/9fans/plan9port.git
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5a8e63b2f0
Move libfmt, libutf into subdirectories of lib9. Add poll-based socket i/o to libthread, so that we can avoid using multiple procs when possible, thus removing dependence on crappy pthreads implementations. Convert samterm, acme to the single-proc libthread. Bring libcomplete, acme up-to-date w.r.t. Plan 9 distribution.
75 lines
903 B
C
75 lines
903 B
C
#include "threadimpl.h"
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/* this will need work */
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enum
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{
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PTABHASH = 257,
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};
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static int multi;
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static Proc *theproc;
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void
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_threadmultiproc(void)
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{
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if(multi == 0){
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multi = 1;
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_threadsetproc(theproc);
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}
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}
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static Lock ptablock;
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Proc *ptab[PTABHASH];
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void
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_threadsetproc(Proc *p)
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{
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int h;
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if(!multi){
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theproc = p;
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return;
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}
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lock(&ptablock);
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h = ((unsigned)p->pid)%PTABHASH;
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p->link = ptab[h];
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unlock(&ptablock);
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ptab[h] = p;
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}
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static Proc*
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__threadgetproc(int rm)
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{
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Proc **l, *p;
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int h, pid;
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if(!multi)
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return theproc;
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pid = _threadgetpid();
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lock(&ptablock);
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h = ((unsigned)pid)%PTABHASH;
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for(l=&ptab[h]; p=*l; l=&p->link){
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if(p->pid == pid){
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if(rm)
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*l = p->link;
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unlock(&ptablock);
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return p;
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}
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}
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unlock(&ptablock);
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return nil;
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}
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Proc*
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_threadgetproc(void)
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{
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return __threadgetproc(0);
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}
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Proc*
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_threaddelproc(void)
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{
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return __threadgetproc(1);
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}
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