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/* -*-c-*- */
/**********************************************************************
thread_win32.c -
$Author$
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#ifdef THREAD_SYSTEM_DEPENDENT_IMPLEMENTATION
#include <process.h>
#define WIN32_WAIT_TIMEOUT 10 /* 10 ms */
#undef Sleep
#define native_thread_yield() Sleep(0)
#define remove_signal_thread_list(th)
static volatile DWORD ruby_native_thread_key = TLS_OUT_OF_INDEXES;
static int native_mutex_lock(rb_thread_lock_t *);
static int native_mutex_unlock(rb_thread_lock_t *);
static int native_mutex_trylock(rb_thread_lock_t *);
static void native_mutex_initialize(rb_thread_lock_t *);
static void native_cond_signal(rb_thread_cond_t *cond);
static void native_cond_broadcast(rb_thread_cond_t *cond);
static void native_cond_wait(rb_thread_cond_t *cond, rb_thread_lock_t *mutex);
static void native_cond_initialize(rb_thread_cond_t *cond);
static void native_cond_destroy(rb_thread_cond_t *cond);
static rb_thread_t *
ruby_thread_from_native(void)
{
return TlsGetValue(ruby_native_thread_key);
}
static int
ruby_thread_set_native(rb_thread_t *th)
{
return TlsSetValue(ruby_native_thread_key, th);
}
static void
Init_native_thread(void)
{
rb_thread_t *th = GET_THREAD();
ruby_native_thread_key = TlsAlloc();
DuplicateHandle(GetCurrentProcess(),
GetCurrentThread(),
GetCurrentProcess(),
&th->thread_id, 0, FALSE, DUPLICATE_SAME_ACCESS);
th->native_thread_data.interrupt_event = CreateEvent(0, TRUE, FALSE, 0);
thread_debug("initial thread (th: %p, thid: %p, event: %p)\n",
th, GET_THREAD()->thread_id,
th->native_thread_data.interrupt_event);
}
static void
w32_error(void)
{
LPVOID lpMsgBuf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) & lpMsgBuf, 0, NULL);
rb_bug("%s", (char*)lpMsgBuf);
}
static void
w32_set_event(HANDLE handle)
{
if (SetEvent(handle) == 0) {
w32_error();
}
}
static void
w32_reset_event(HANDLE handle)
{
if (ResetEvent(handle) == 0) {
w32_error();
}
}
static int
w32_wait_events(HANDLE *events, int count, DWORD timeout, rb_thread_t *th)
{
HANDLE *targets = events;
HANDLE intr;
DWORD ret;
thread_debug(" w32_wait_events events:%p, count:%d, timeout:%ld, th:%p\n",
events, count, timeout, th);
if (th && (intr = th->native_thread_data.interrupt_event)) {
w32_reset_event(intr);
if (RUBY_VM_INTERRUPTED(th)) {
w32_set_event(intr);
}
targets = ALLOCA_N(HANDLE, count + 1);
memcpy(targets, events, sizeof(HANDLE) * count);
targets[count++] = intr;
thread_debug(" * handle: %p (count: %d, intr)\n", intr, count);
}
thread_debug(" WaitForMultipleObjects start (count: %d)\n", count);
ret = WaitForMultipleObjects(count, targets, FALSE, timeout);
thread_debug(" WaitForMultipleObjects end (ret: %lu)\n", ret);
if (ret == WAIT_OBJECT_0 + count - 1 && th) {
errno = EINTR;
}
if (ret == -1 && THREAD_DEBUG) {
int i;
DWORD dmy;
for (i = 0; i < count; i++) {
thread_debug(" * error handle %d - %s\n", i,
GetHandleInformation(targets[i], &dmy) ? "OK" : "NG");
}
}
return ret;
}
static void ubf_handle(void *ptr);
#define ubf_select ubf_handle
int
rb_w32_wait_events_blocking(HANDLE *events, int num, DWORD timeout)
{
return w32_wait_events(events, num, timeout, GET_THREAD());
}
int
rb_w32_wait_events(HANDLE *events, int num, DWORD timeout)
{
int ret;
BLOCKING_REGION(ret = rb_w32_wait_events_blocking(events, num, timeout),
ubf_handle, GET_THREAD());
return ret;
}
static void
w32_close_handle(HANDLE handle)
{
if (CloseHandle(handle) == 0) {
w32_error();
}
}
static void
w32_resume_thread(HANDLE handle)
{
if (ResumeThread(handle) == -1) {
w32_error();
}
}
#ifdef _MSC_VER
#define HAVE__BEGINTHREADEX 1
#else
#undef HAVE__BEGINTHREADEX
#endif
#ifdef HAVE__BEGINTHREADEX
#define start_thread (HANDLE)_beginthreadex
typedef unsigned long (_stdcall *w32_thread_start_func)(void*);
#else
#define start_thread CreateThread
typedef LPTHREAD_START_ROUTINE w32_thread_start_func;
#endif
static HANDLE
w32_create_thread(DWORD stack_size, w32_thread_start_func func, void *val)
{
return start_thread(0, stack_size, func, val, CREATE_SUSPENDED, 0);
}
int
rb_w32_sleep(unsigned long msec)
{
return w32_wait_events(0, 0, msec, GET_THREAD());
}
int WINAPI
rb_w32_Sleep(unsigned long msec)
{
int ret;
BLOCKING_REGION(ret = rb_w32_sleep(msec),
ubf_handle, GET_THREAD());
return ret;
}
static void
native_sleep(rb_thread_t *th, struct timeval *tv, int deadlockable)
{
int prev_status = th->status;
DWORD msec;
if (tv) {
msec = tv->tv_sec * 1000 + tv->tv_usec / 1000;
}
else {
msec = INFINITE;
}
if (!tv && deadlockable) {
th->status = THREAD_STOPPED_FOREVER;
th->vm->sleeper++;
rb_check_deadlock(th->vm);
}
else {
th->status = THREAD_STOPPED;
}
GVL_UNLOCK_BEGIN();
{
DWORD ret;
th->unblock.func = ubf_handle;
th->unblock.arg = th;
if (RUBY_VM_INTERRUPTED(th)) {
/* interrupted. return immediate */
}
else {
thread_debug("native_sleep start (%lu)\n", msec);
ret = w32_wait_events(0, 0, msec, th);
thread_debug("native_sleep done (%lu)\n", ret);
}
th->unblock.func = 0;
th->unblock.arg = 0;
}
GVL_UNLOCK_END();
th->status = prev_status;
if (!tv && deadlockable) th->vm->sleeper--;
RUBY_VM_CHECK_INTS();
}
static int
native_mutex_lock(rb_thread_lock_t *lock)
{
#if USE_WIN32_MUTEX
DWORD result;
while (1) {
thread_debug("native_mutex_lock: %p\n", *lock);
result = w32_wait_events(&*lock, 1, INFINITE, 0);
switch (result) {
case WAIT_OBJECT_0:
/* get mutex object */
thread_debug("acquire mutex: %p\n", *lock);
return 0;
case WAIT_OBJECT_0 + 1:
/* interrupt */
errno = EINTR;
thread_debug("acquire mutex interrupted: %p\n", *lock);
return 0;
case WAIT_TIMEOUT:
thread_debug("timeout mutex: %p\n", *lock);
break;
case WAIT_ABANDONED:
rb_bug("win32_mutex_lock: WAIT_ABANDONED");
break;
default:
rb_bug("win32_mutex_lock: unknown result (%d)", result);
break;
}
}
return 0;
#else
EnterCriticalSection(lock);
return 0;
#endif
}
static int
native_mutex_unlock(rb_thread_lock_t *lock)
{
#if USE_WIN32_MUTEX
thread_debug("release mutex: %p\n", *lock);
return ReleaseMutex(*lock);
#else
LeaveCriticalSection(lock);
return 0;
#endif
}
static int
native_mutex_trylock(rb_thread_lock_t *lock)
{
#if USE_WIN32_MUTEX
int result;
thread_debug("native_mutex_trylock: %p\n", *lock);
result = w32_wait_events(&*lock, 1, 1, 0);
thread_debug("native_mutex_trylock result: %d\n", result);
switch (result) {
case WAIT_OBJECT_0:
return 0;
case WAIT_TIMEOUT:
return EBUSY;
}
return EINVAL;
#else
return TryEnterCriticalSection(lock) == 0;
#endif
}
static void
native_mutex_initialize(rb_thread_lock_t *lock)
{
#if USE_WIN32_MUTEX
*lock = CreateMutex(NULL, FALSE, NULL);
if (*lock == NULL) {
w32_error();
}
/* thread_debug("initialize mutex: %p\n", *lock); */
#else
InitializeCriticalSection(lock);
#endif
}
static void
native_mutex_destroy(rb_thread_lock_t *lock)
{
#if USE_WIN32_MUTEX
w32_close_handle(lock);
#else
DeleteCriticalSection(lock);
#endif
}
struct cond_event_entry {
struct cond_event_entry* next;
HANDLE event;
};
struct rb_thread_cond_struct {
struct cond_event_entry *next;
struct cond_event_entry *last;
};
static void
native_cond_signal(rb_thread_cond_t *cond)
{
/* cond is guarded by mutex */
struct cond_event_entry *e = cond->next;
if (e) {
cond->next = e->next;
SetEvent(e->event);
}
else {
rb_bug("native_cond_signal: no pending threads");
}
}
static void
native_cond_broadcast(rb_thread_cond_t *cond)
{
/* cond is guarded by mutex */
struct cond_event_entry *e = cond->next;
cond->next = 0;
while (e) {
SetEvent(e->event);
e = e->next;
}
}
static void
native_cond_wait(rb_thread_cond_t *cond, rb_thread_lock_t *mutex)
{
DWORD r;
struct cond_event_entry entry;
entry.next = 0;
entry.event = CreateEvent(0, FALSE, FALSE, 0);
/* cond is guarded by mutex */
if (cond->next) {
cond->last->next = &entry;
cond->last = &entry;
}
else {
cond->next = &entry;
cond->last = &entry;
}
native_mutex_unlock(mutex);
{
r = WaitForSingleObject(entry.event, INFINITE);
if (r != WAIT_OBJECT_0) {
rb_bug("native_cond_wait: WaitForSingleObject returns %lu", r);
}
}
native_mutex_lock(mutex);
w32_close_handle(entry.event);
}
static void
native_cond_initialize(rb_thread_cond_t *cond)
{
cond->next = 0;
cond->last = 0;
}
static void
native_cond_destroy(rb_thread_cond_t *cond)
{
/* */
}
void
ruby_init_stack(VALUE *addr)
{
}
#define CHECK_ERR(expr) \
{if (!(expr)) {rb_bug("err: %lu - %s", GetLastError(), #expr);}}
static void
native_thread_init_stack(rb_thread_t *th)
{
MEMORY_BASIC_INFORMATION mi;
char *base, *end;
DWORD size, space;
CHECK_ERR(VirtualQuery(&mi, &mi, sizeof(mi)));
base = mi.AllocationBase;
end = mi.BaseAddress;
end += mi.RegionSize;
size = end - base;
space = size / 5;
if (space > 1024*1024) space = 1024*1024;
th->machine_stack_start = (VALUE *)end - 1;
th->machine_stack_maxsize = size - space;
}
static void
native_thread_destroy(rb_thread_t *th)
{
HANDLE intr = th->native_thread_data.interrupt_event;
native_mutex_destroy(&th->interrupt_lock);
thread_debug("close handle - intr: %p, thid: %p\n", intr, th->thread_id);
th->native_thread_data.interrupt_event = 0;
w32_close_handle(intr);
}
static unsigned long _stdcall
thread_start_func_1(void *th_ptr)
{
rb_thread_t *th = th_ptr;
VALUE stack_start;
volatile HANDLE thread_id = th->thread_id;
native_thread_init_stack(th);
th->native_thread_data.interrupt_event = CreateEvent(0, TRUE, FALSE, 0);
/* run */
thread_debug("thread created (th: %p, thid: %p, event: %p)\n", th,
th->thread_id, th->native_thread_data.interrupt_event);
thread_start_func_2(th, &stack_start, 0);
w32_close_handle(thread_id);
thread_debug("thread deleted (th: %p)\n", th);
return 0;
}
static int
native_thread_create(rb_thread_t *th)
{
size_t stack_size = 4 * 1024; /* 4KB */
th->thread_id = w32_create_thread(stack_size, thread_start_func_1, th);
if ((th->thread_id) == 0) {
st_delete_wrap(th->vm->living_threads, th->self);
rb_raise(rb_eThreadError, "can't create Thread (%d)", errno);
}
w32_resume_thread(th->thread_id);
if (THREAD_DEBUG) {
Sleep(0);
thread_debug("create: (th: %p, thid: %p, intr: %p), stack size: %d\n",
th, th->thread_id,
th->native_thread_data.interrupt_event, stack_size);
}
return 0;
}
static void
native_thread_join(HANDLE th)
{
w32_wait_events(&th, 1, 0, 0);
}
static void
native_thread_apply_priority(rb_thread_t *th)
{
int priority = th->priority;
if (th->priority > 0) {
priority = THREAD_PRIORITY_ABOVE_NORMAL;
}
else if (th->priority < 0) {
priority = THREAD_PRIORITY_BELOW_NORMAL;
}
else {
priority = THREAD_PRIORITY_NORMAL;
}
SetThreadPriority(th->thread_id, priority);
}
static void
ubf_handle(void *ptr)
{
rb_thread_t *th = (rb_thread_t *)ptr;
thread_debug("ubf_handle: %p\n", th);
w32_set_event(th->native_thread_data.interrupt_event);
}
static void timer_thread_function(void);
static HANDLE timer_thread_id = 0;
static unsigned long _stdcall
timer_thread_func(void *dummy)
{
thread_debug("timer_thread\n");
while (system_working) {
Sleep(WIN32_WAIT_TIMEOUT);
timer_thread_function();
}
thread_debug("timer killed\n");
return 0;
}
void
rb_thread_create_timer_thread(void)
{
if (timer_thread_id == 0) {
timer_thread_id = w32_create_thread(1024, timer_thread_func, 0);
w32_resume_thread(timer_thread_id);
}
}
#endif /* THREAD_SYSTEM_DEPENDENT_IMPLEMENTATION */
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