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/* Written by Kris Maglione <maglione.k at Gmail> */
/* Public domain */
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <task.h>
#include "ixp_local.h"
static IxpThread ixp_task;
/**
* Function: ixp_taskinit
*
* This function initializes libixp for use in multithreaded
* programs using the libtask threading system. When using libixp in
* such programs, this function must be called before any other
* libixp functions.
*
* This function is part of libixp_task, which is part of the libixp
* distribution, but is not built by default unless enabled in
* config.mk.
*/
int
ixp_taskinit() {
ixp_thread = &ixp_task;
return 0;
}
static char*
errbuf(void) {
void **p;
p = taskdata();
if(*p == nil)
*p = emallocz(IXP_ERRMAX);
return *p;
}
/* Mutex */
static int
initmutex(IxpMutex *m) {
m->aux = emallocz(sizeof(QLock));
return 0;
}
static void
mdestroy(IxpMutex *m) {
free(m->aux);
m->aux = nil;
}
static void
mlock(IxpMutex *m) {
qlock(m->aux);
}
static int
mcanlock(IxpMutex *m) {
return canqlock(m->aux);
}
static void
munlock(IxpMutex *m) {
qunlock(m->aux);
}
/* RWLock */
static int
initrwlock(IxpRWLock *rw) {
rw->aux = emallocz(sizeof(RWLock));
return 0;
}
static void
rwdestroy(IxpRWLock *rw) {
free(rw->aux);
rw->aux = nil;
}
static void
_rlock(IxpRWLock *rw) {
rlock(rw->aux);
}
static int
_canrlock(IxpRWLock *rw) {
return canrlock(rw->aux);
}
static void
_wlock(IxpRWLock *rw) {
wlock(rw->aux);
}
static int
_canwlock(IxpRWLock *rw) {
return canwlock(rw->aux);
}
static void
_runlock(IxpRWLock *rw) {
runlock(rw->aux);
}
static void
_wunlock(IxpRWLock *rw) {
wunlock(rw->aux);
}
/* Rendez */
static int
initrendez(IxpRendez *r) {
r->aux = emallocz(sizeof(Rendez));
return 0;
}
static void
rdestroy(IxpRendez *r) {
free(r->aux);
r->aux = nil;
}
static void
rsleep(IxpRendez *r) {
Rendez *rz;
rz = r->aux;
rz->l = r->mutex->aux;
tasksleep(rz);
}
static int
rwake(IxpRendez *r) {
Rendez *rz;
rz = r->aux;
rz->l = r->mutex->aux;
return taskwakeup(rz);
}
static int
rwakeall(IxpRendez *r) {
Rendez *rz;
rz = r->aux;
rz->l = r->mutex->aux;
return taskwakeupall(rz);
}
/* Yielding IO */
static ssize_t
_read(int fd, void *buf, size_t size) {
fdnoblock(fd);
return fdread(fd, buf, size);
}
static ssize_t
_write(int fd, const void *buf, size_t size) {
fdnoblock(fd);
return fdwrite(fd, (void*)buf, size);
}
static IxpThread ixp_task = {
/* Mutex */
.initmutex = initmutex,
.lock = mlock,
.canlock = mcanlock,
.unlock = munlock,
.mdestroy = mdestroy,
/* RWLock */
.initrwlock = initrwlock,
.rlock = _rlock,
.canrlock = _canrlock,
.wlock = _wlock,
.canwlock = _canwlock,
.runlock = _runlock,
.wunlock = _wunlock,
.rwdestroy = rwdestroy,
/* Rendez */
.initrendez = initrendez,
.sleep = rsleep,
.wake = rwake,
.wakeall = rwakeall,
.rdestroy = rdestroy,
/* Other */
.errbuf = errbuf,
.read = _read,
.write = _write,
.select = select, /* wrong */
};
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