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/*
* On Linux 2.6 and later, we can use pthreads (in fact, we must),
* but on earlier Linux, pthreads are incompatible with using our
* own coroutines in libthread. In order to make binaries that work
* on either system, we detect the pthread library in use and call
* the appropriate functions.
*/
#include <u.h>
#include <signal.h>
#include <pthread.h>
#include <libc.h>
#define _procsleep _procsleep_signal
#define _procwakeup _procwakeup_signal
#include "rendez-signal.c"
#undef _procsleep
#undef _procwakeup
#define _procsleep _procsleep_pthread
#define _procwakeup _procwakeup_pthread
#include "rendez-pthread.c"
#undef _procsleep
#undef _procwakeup
int
_islinuxnptl(void)
{
static char buf[100];
static int isnptl = -1;
if(isnptl == -1){
if(confstr(_CS_GNU_LIBPTHREAD_VERSION, buf, sizeof buf) > 0
&& strncmp(buf, "NPTL", 4) == 0)
isnptl = 1;
else
isnptl = 0;
}
return isnptl;
}
void
_procsleep(_Procrend *r)
{
if(_islinuxnptl())
return _procsleep_pthread(r);
else
return _procsleep_signal(r);
}
void
_procwakeup(_Procrend *r)
{
if(_islinuxnptl())
return _procwakeup_pthread(r);
else
return _procwakeup_signal(r);
}
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