/*
* Returns: [thread_ludata]
*/
static int
thread_init (lua_State *L)
{
struct sys_thread *td;
/* TLS Index */
if (g_TLSIndex == INVALID_TLS_INDEX) {
#ifndef _WIN32
const int res = pthread_key_create(&g_TLSIndex, NULL);
if (res) {
errno = res;
goto err;
}
#else
if ((g_TLSIndex = TlsAlloc()) == INVALID_TLS_INDEX)
goto err;
#endif
}
/* VM Mutex */
td = sys_get_thread();
if (!td) {
if (vmthread_new(L, (void *) &td))
goto err;
thread_settable(L, L, td->tid);
sys_set_thread(td);
sys_vm2_enter(td);
}
lua_pushlightuserdata(L, td->vmtd);
return 1;
err:
return sys_seterror(L, 0);
}
void
sys_vm_leave (void)
{
if (g_TLSIndex == INVALID_TLS_INDEX)
return;
sys_vm2_leave(sys_get_thread());
}
/*
* Arguments: dpool_udata, data_items (any) ...
*/
static int
dpool_put (lua_State *L)
{
struct sys_thread *td = sys_get_thread();
struct data_pool *dp = checkudata(L, 1, DPOOL_TYPENAME);
int nput = lua_gettop(L) - 1;
if (!td) luaL_argerror(L, 0, "Threading not initialized");
if (!nput) luaL_argerror(L, 2, "data expected");
lua_getfenv(L, 1); /* storage */
lua_insert(L, 1);
if (dp->n >= dp->max) {
if (dp->flags & DPOOL_PUTONFULL) {
lua_pushlightuserdata(L, (void *) DPOOL_PUTONFULL);
lua_rawget(L, 1);
lua_insert(L, 2);
lua_call(L, 1 + nput, LUA_MULTRET);
nput = lua_gettop(L) - 1;
if (!nput) return 0;
} else do {
if (thread_event_wait(&dp->tev, TIMEOUT_INFINITE))
return sys_seterror(L, 0);
} while (dp->n >= dp->max);
}
/* Try directly move data between threads */
if (dp->nwaits && !dp->td) {
dp->td = td;
dp->nput = nput;
thread_event_signal(&dp->tev);
thread_yield(L);
dp->td = NULL;
if (!dp->nput) return 0; /* moved to thread */
dp->nput = 0;
}
/* Keep data in the storage */
{
int top = dp->top;
lua_pushinteger(L, nput);
do {
lua_rawseti(L, 1, ++top);
} while (nput--);
dp->top = top;
/* notify event_queue */
if (!dp->n++ && dp->trigger)
sys_trigger_notify(&dp->trigger, SYS_EVREAD);
thread_event_signal(&dp->tev);
}
return 0;
}
/*
* Returns: [thread_ludata, main thread_ludata]
*/
static int
thread_self (lua_State *L)
{
struct sys_thread *td = sys_get_thread();
if (!td) return 0;
lua_pushlightuserdata(L, td);
lua_pushlightuserdata(L, td->vmtd);
return 2;
}
void
sys_vm_enter (void)
{
struct sys_thread *td;
if (g_TLSIndex == INVALID_TLS_INDEX)
return;
td = sys_get_thread();
sys_vm2_enter(td);
if (td && td->interrupted) {
lua_pushlightuserdata(td->L, &g_TLSIndex);
lua_error(td->L);
}
}
static int
channel_put (lua_State *L)
{
struct sys_thread *td = sys_get_thread();
struct channel *chan = checkudata(L, 1, CHANNEL_TYPENAME);
int nput = lua_gettop(L) - 1;
if (!td) luaL_argerror(L, 0, "Threading not initialized");
if (!nput) luaL_argerror(L, 2, "data expected");
lua_getfenv(L, 1); /* get the storage table */
lua_insert(L, 1);
sys_vm_leave();
thread_critsect_enter(&chan->mutex);
thread_cond_signal(&chan->put);
/* move the data to storage */
{
int top = chan->top;
lua_pushinteger(L, nput);
do {
lua_rawseti(L, 1, ++top);
} while (nput--);
chan->top = top;
chan->n++;
}
while (chan->n > chan->max) {
thread_cond_wait(&chan->get, &chan->mutex, TIMEOUT_INFINITE);
}
thread_critsect_leave(&chan->mutex);
sys_vm_enter();
return 0;
}
/*
* Arguments: filename (string) | function_dump (string),
* [arguments (string | number | boolean | lightuserdata) ...]
* Returns: [thread_ludata]
*/
static int
thread_runvm (lua_State *L)
{
const char *path = luaL_checkstring(L, 1);
lua_State *NL = NULL;
struct sys_vmthread *vmtd = (struct sys_vmthread *) sys_get_thread();
#ifndef _WIN32
pthread_attr_t attr;
#else
HANDLE hThr;
#endif
int res = 0;
if (!vmtd) luaL_argerror(L, 0, "Threading not initialized");
NL = luaL_newstate();
if (!NL) goto err;
thread_openlibs(NL);
if (path[0] == LUA_SIGNATURE[0]
? luaL_loadbuffer(NL, path, lua_rawlen(L, 1), "thread")
: luaL_loadfile(NL, path)) {
lua_pushstring(L, lua_tostring(NL, -1)); /* error message */
lua_close(NL);
lua_error(L);
}
/* Arguments */
lua_pushlightuserdata(NL, vmtd); /* master */
{
int i, top = lua_gettop(L);
for (i = 2; i <= top; ++i) {
switch (lua_type(L, i)) {
case LUA_TSTRING:
lua_pushstring(NL, lua_tostring(L, i));
break;
case LUA_TNUMBER:
lua_pushnumber(NL, lua_tonumber(L, i));
break;
case LUA_TBOOLEAN:
lua_pushboolean(NL, lua_toboolean(L, i));
break;
case LUA_TLIGHTUSERDATA:
case LUA_TUSERDATA:
lua_pushlightuserdata(NL, lua_touserdata(L, i));
break;
default:
luaL_argerror(L, i, "primitive type expected");
}
}
}
if (vmthread_new(NL, &vmtd))
goto err_clean;
#ifndef _WIN32
res = pthread_attr_init(&attr);
if (res) goto err_clean;
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
res = pthread_create(&vmtd->td.tid, &attr,
(thread_func_t) thread_startvm, vmtd);
pthread_attr_destroy(&attr);
if (!res) {
#else
hThr = (HANDLE) _beginthreadex(NULL, 0,
(thread_func_t) thread_startvm, vmtd, 0, &vmtd->td.tid);
if (hThr) {
CloseHandle(hThr);
#endif
lua_pushlightuserdata(L, vmtd);
return 1;
}
err_clean:
lua_close(NL);
err:
return sys_seterror(L, res);
}
/*
* Arguments: thread_ludata
*/
static int
thread_interrupt (lua_State *L)
{
struct sys_thread *td = lua_touserdata(L, 1);
td->interrupted = 1;
#ifndef _WIN32
pthread_kill(td->tid, SYS_SIGINTR);
#endif
return 0;
}
static int
thread_yield (lua_State *L)
{
(void) L;
sys_vm_leave();
#ifndef _WIN32
sched_yield();
#else
Sleep(0);
#endif
sys_vm_enter();
return 0;
}
/*
* Arguments: function, [arguments (any) ...]
* Returns: [thread_ludata]
*/
static int
thread_run (lua_State *L)
{
struct sys_thread *vmtd = sys_get_thread();
lua_State *NL;
struct sys_thread *td;
#ifndef _WIN32
pthread_attr_t attr;
int res = 0;
#else
HANDLE hThr;
const int res = 0;
#endif
if (!vmtd) luaL_argerror(L, 0, "Threading not initialized");
luaL_checktype(L, 1, LUA_TFUNCTION);
NL = lua_newthread(L);
if (!NL) goto err;
td = lua_newuserdata(L, sizeof(struct sys_thread));
memset(td, 0, sizeof(struct sys_thread));
td->mutex = vmtd->mutex;
td->L = NL;
td->vmtd = vmtd->vmtd;
#ifndef _WIN32
if ((res = pthread_attr_init(&attr))
|| (res = pthread_attr_setstacksize(&attr, THREAD_STACK_SIZE)))
goto err;
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
res = pthread_create(&td->tid, &attr,
(thread_func_t) thread_start, td);
pthread_attr_destroy(&attr);
if (!res) {
#else
hThr = (HANDLE) _beginthreadex(NULL, THREAD_STACK_SIZE,
(thread_func_t) thread_start, td, 0, &td->tid);
if (hThr) {
CloseHandle(hThr);
#endif
thread_settable(L, NL, td->tid); /* save thread to avoid GC */
lua_xmove(L, NL, lua_gettop(L)); /* move function and args to NL */
lua_pushlightuserdata(L, td);
return 1;
}
err:
return sys_seterror(L, res);
}
/*
* Arguments: function, master (thread_ludata),
* [arguments (string | number | boolean | lightuserdata) ...],
* thread, thread_udata
*/
static THREAD_FUNC_API
thread_startvm (struct sys_thread *td)
{
lua_State *L = td->L;
thread_settable(L, L, td->tid);
sys_set_thread(td);
sys_vm2_enter(td);
if (lua_pcall(L, lua_gettop(L) - 1, 0, 0)) {
if (td->interrupted && lua_touserdata(L, -1) == &g_TLSIndex)
lua_pop(L, 1);
else
lua_error(L);
}
/* notify event_queue */
if (td->trigger)
sys_trigger_notify(&td->trigger, SYS_EVEOF | SYS_EVDEL);
lua_close(L);
return 0;
}
