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starting to work on Linux

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This commit is contained in:
rsc 2004-12-27 18:21:58 +00:00
parent e127e40bb1
commit 955a2ca78d
5 changed files with 80 additions and 19 deletions
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39
src/libthread/Linux.c
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@ -87,6 +87,7 @@ _procsleep(_Procrendez *r)
* unlock the vouslock so our waker can wake us,
* and then suspend.
*/
again:
r->asleep = 1;
r->pid = getpid();
@ -101,9 +102,13 @@ _procsleep(_Procrendez *r)
/*
* We're awake. Make USR1 not interrupt system calls.
*/
ignusr1(1);
assert(r->asleep == 0);
lock(r->l);
ignusr1(1);
if(r->asleep && r->pid == getpid()){
print("resleep %d\n", getpid());
/* Didn't really wake up - signal from something else */
goto again;
}
}
void
@ -233,6 +238,7 @@ static char *threadexitsmsg;
void
sigusr2handler(int s)
{
print("%d usr2 %d\n", time(0), getpid());
if(threadexitsmsg)
_exits(threadexitsmsg);
}
@ -259,6 +265,35 @@ threadexitsall(char *msg)
exits(msg);
}
/*
* exec - need to arrange for wait proc to run
* the execs so it gets the wait messages
*/
int
_runthreadspawn(int *fd, char *cmd, char **argv)
{
Execjob e;
int pid;
e.fd = fd;
e.cmd = cmd;
e.argv = argv;
e.c = chancreate(sizeof(ulong), 0);
print("%d run\n", time(0));
qlock(&_threadexeclock);
sendp(_threadexecchan, &e);
print("%d sent\n", time(0));
while(_threadexecproc == nil)
yield();
kill(_threadexecproc->osprocid, SIGUSR2);
print("%d killed\n", time(0));
pid = recvul(e.c);
qunlock(&_threadexeclock);
print("%d ran\n", time(0));
return pid;
}
/*
* per-process data, indexed by pid
*