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Fighting the good fight. 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.
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1 #include "threadimpl.h"

3 /* this will need work */

4 enum

5 {

6 	PTABHASH = 257,

7 };

9 static int multi;

10 static Proc *theproc;

12 void

13 _threadmultiproc(void)

14 {

15 	if(multi == 0){

16 		multi = 1;

17 		_threadsetproc(theproc);

18 	}

19 }

21 static Lock ptablock;

22 Proc *ptab[PTABHASH];

24 void

25 _threadsetproc(Proc *p)

26 {

27 	int h;

29 	if(!multi){

30 		theproc = p;

31 		return;

32 	}

33 	lock(&ptablock);

34 	h = ((unsigned)p->pid)%PTABHASH;

35 	p->link = ptab[h];

36 	unlock(&ptablock);

37 	ptab[h] = p;

38 }

40 static Proc*

41 __threadgetproc(int rm)

42 {

43 	Proc **l, *p;

44 	int h, pid;

46 	if(!multi)

47 		return theproc;

49 	pid = _threadgetpid();

51 	lock(&ptablock);

52 	h = ((unsigned)pid)%PTABHASH;

53 	for(l=&ptab[h]; p=*l; l=&p->link){

54 		if(p->pid == pid){

55 			if(rm)

56 				*l = p->link;

57 			unlock(&ptablock);

58 			return p;

59 		}

60 	}

61 	unlock(&ptablock);

62 	return nil;

63 }

65 Proc*

66 _threadgetproc(void)

67 {

68 	return __threadgetproc(0);

69 }

71 Proc*

72 _threaddelproc(void)

73 {

74 	return __threadgetproc(1);

75 }