2 * w32event-unix.c: Runtime support for managed Event on Unix
5 * Ludovic Henry (luhenry@microsoft.com)
7 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
12 #include "w32handle-namespace.h"
13 #include "mono/io-layer/io-layer.h"
14 #include "mono/utils/mono-logger-internals.h"
15 #include "mono/metadata/w32handle.h"
22 struct MonoW32HandleNamedEvent
{
24 MonoW32HandleNamespace sharedns
;
27 static gboolean
event_handle_own (gpointer handle
, MonoW32HandleType type
, gboolean
*abandoned
)
29 MonoW32HandleEvent
*event_handle
;
34 ok
= mono_w32handle_lookup (handle
, type
, (gpointer
*)&event_handle
);
36 g_warning ("%s: error looking up %s handle %p",
37 __func__
, mono_w32handle_get_typename (type
), handle
);
41 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: owning %s handle %p",
42 __func__
, mono_w32handle_get_typename (type
), handle
);
44 if (!event_handle
->manual
) {
45 g_assert (event_handle
->set_count
> 0);
46 event_handle
->set_count
--;
48 if (event_handle
->set_count
== 0)
49 mono_w32handle_set_signal_state (handle
, FALSE
, FALSE
);
55 static void event_signal(gpointer handle
)
57 ves_icall_System_Threading_Events_SetEvent_internal (handle
);
60 static gboolean
event_own (gpointer handle
, gboolean
*abandoned
)
62 return event_handle_own (handle
, MONO_W32HANDLE_EVENT
, abandoned
);
65 static void namedevent_signal (gpointer handle
)
67 ves_icall_System_Threading_Events_SetEvent_internal (handle
);
70 /* NB, always called with the shared handle lock held */
71 static gboolean
namedevent_own (gpointer handle
, gboolean
*abandoned
)
73 return event_handle_own (handle
, MONO_W32HANDLE_NAMEDEVENT
, abandoned
);
76 static void event_details (gpointer data
)
78 MonoW32HandleEvent
*event
= (MonoW32HandleEvent
*)data
;
79 g_print ("manual: %s, set_count: %d",
80 event
->manual
? "TRUE" : "FALSE", event
->set_count
);
83 static void namedevent_details (gpointer data
)
85 MonoW32HandleNamedEvent
*namedevent
= (MonoW32HandleNamedEvent
*)data
;
86 g_print ("manual: %s, set_count: %d, name: \"%s\"",
87 namedevent
->e
.manual
? "TRUE" : "FALSE", namedevent
->e
.set_count
, namedevent
->sharedns
.name
);
90 static const gchar
* event_typename (void)
95 static gsize
event_typesize (void)
97 return sizeof (MonoW32HandleEvent
);
100 static const gchar
* namedevent_typename (void)
105 static gsize
namedevent_typesize (void)
107 return sizeof (MonoW32HandleNamedEvent
);
111 mono_w32event_init (void)
113 static MonoW32HandleOps event_ops
= {
115 event_signal
, /* signal */
118 NULL
, /* special_wait */
120 event_details
, /* details */
121 event_typename
, /* typename */
122 event_typesize
, /* typesize */
125 static MonoW32HandleOps namedevent_ops
= {
127 namedevent_signal
, /* signal */
128 namedevent_own
, /* own */
130 NULL
, /* special_wait */
132 namedevent_details
, /* details */
133 namedevent_typename
, /* typename */
134 namedevent_typesize
, /* typesize */
137 mono_w32handle_register_ops (MONO_W32HANDLE_EVENT
, &event_ops
);
138 mono_w32handle_register_ops (MONO_W32HANDLE_NAMEDEVENT
, &namedevent_ops
);
140 mono_w32handle_register_capabilities (MONO_W32HANDLE_EVENT
,
141 (MonoW32HandleCapability
)(MONO_W32HANDLE_CAP_WAIT
| MONO_W32HANDLE_CAP_SIGNAL
));
142 mono_w32handle_register_capabilities (MONO_W32HANDLE_NAMEDEVENT
,
143 (MonoW32HandleCapability
)(MONO_W32HANDLE_CAP_WAIT
| MONO_W32HANDLE_CAP_SIGNAL
));
147 mono_w32event_create (gboolean manual
, gboolean initial
)
152 handle
= ves_icall_System_Threading_Events_CreateEvent_internal (manual
, initial
, NULL
, &error
);
153 if (error
!= ERROR_SUCCESS
)
160 mono_w32event_set (gpointer handle
)
162 ves_icall_System_Threading_Events_SetEvent_internal (handle
);
166 mono_w32event_reset (gpointer handle
)
168 ves_icall_System_Threading_Events_ResetEvent_internal (handle
);
171 static gpointer
event_handle_create (MonoW32HandleEvent
*event_handle
, MonoW32HandleType type
, gboolean manual
, gboolean initial
)
175 event_handle
->manual
= manual
;
176 event_handle
->set_count
= (initial
&& !manual
) ? 1 : 0;
178 handle
= mono_w32handle_new (type
, event_handle
);
179 if (handle
== INVALID_HANDLE_VALUE
) {
180 g_warning ("%s: error creating %s handle",
181 __func__
, mono_w32handle_get_typename (type
));
182 SetLastError (ERROR_GEN_FAILURE
);
186 mono_w32handle_lock_handle (handle
);
189 mono_w32handle_set_signal_state (handle
, TRUE
, FALSE
);
191 mono_w32handle_unlock_handle (handle
);
193 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: created %s handle %p",
194 __func__
, mono_w32handle_get_typename (type
), handle
);
199 static gpointer
event_create (gboolean manual
, gboolean initial
)
201 MonoW32HandleEvent event_handle
;
202 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: creating %s handle",
203 __func__
, mono_w32handle_get_typename (MONO_W32HANDLE_EVENT
));
204 return event_handle_create (&event_handle
, MONO_W32HANDLE_EVENT
, manual
, initial
);
207 static gpointer
namedevent_create (gboolean manual
, gboolean initial
, const gunichar2
*name G_GNUC_UNUSED
)
212 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: creating %s handle",
213 __func__
, mono_w32handle_get_typename (MONO_W32HANDLE_NAMEDEVENT
));
215 /* w32 seems to guarantee that opening named objects can't race each other */
216 mono_w32handle_namespace_lock ();
218 utf8_name
= g_utf16_to_utf8 (name
, -1, NULL
, NULL
, NULL
);
220 handle
= mono_w32handle_namespace_search_handle (MONO_W32HANDLE_NAMEDEVENT
, utf8_name
);
221 if (handle
== INVALID_HANDLE_VALUE
) {
222 /* The name has already been used for a different object. */
224 SetLastError (ERROR_INVALID_HANDLE
);
226 /* Not an error, but this is how the caller is informed that the event wasn't freshly created */
227 SetLastError (ERROR_ALREADY_EXISTS
);
229 /* mono_w32handle_namespace_search_handle already adds a ref to the handle */
231 /* A new named event */
232 MonoW32HandleNamedEvent namedevent_handle
;
234 strncpy (&namedevent_handle
.sharedns
.name
[0], utf8_name
, MAX_PATH
);
235 namedevent_handle
.sharedns
.name
[MAX_PATH
] = '\0';
237 handle
= event_handle_create ((MonoW32HandleEvent
*) &namedevent_handle
, MONO_W32HANDLE_NAMEDEVENT
, manual
, initial
);
242 mono_w32handle_namespace_unlock ();
248 ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual
, MonoBoolean initial
, MonoString
*name
, gint32
*error
)
252 /* Need to blow away any old errors here, because code tests
253 * for ERROR_ALREADY_EXISTS on success (!) to see if an event
254 * was freshly created */
255 SetLastError (ERROR_SUCCESS
);
257 event
= name
? namedevent_create (manual
, initial
, mono_string_chars (name
)) : event_create (manual
, initial
);
259 *error
= GetLastError ();
265 ves_icall_System_Threading_Events_SetEvent_internal (gpointer handle
)
267 MonoW32HandleType type
;
268 MonoW32HandleEvent
*event_handle
;
270 if (handle
== NULL
) {
271 SetLastError (ERROR_INVALID_HANDLE
);
275 switch (type
= mono_w32handle_get_type (handle
)) {
276 case MONO_W32HANDLE_EVENT
:
277 case MONO_W32HANDLE_NAMEDEVENT
:
280 SetLastError (ERROR_INVALID_HANDLE
);
284 if (!mono_w32handle_lookup (handle
, type
, (gpointer
*)&event_handle
)) {
285 g_warning ("%s: error looking up %s handle %p",
286 __func__
, mono_w32handle_get_typename (type
), handle
);
290 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: setting %s handle %p",
291 __func__
, mono_w32handle_get_typename (type
), handle
);
293 mono_w32handle_lock_handle (handle
);
295 if (!event_handle
->manual
) {
296 event_handle
->set_count
= 1;
297 mono_w32handle_set_signal_state (handle
, TRUE
, FALSE
);
299 mono_w32handle_set_signal_state (handle
, TRUE
, TRUE
);
302 mono_w32handle_unlock_handle (handle
);
308 ves_icall_System_Threading_Events_ResetEvent_internal (gpointer handle
)
310 MonoW32HandleType type
;
311 MonoW32HandleEvent
*event_handle
;
313 SetLastError (ERROR_SUCCESS
);
315 if (handle
== NULL
) {
316 SetLastError (ERROR_INVALID_HANDLE
);
320 switch (type
= mono_w32handle_get_type (handle
)) {
321 case MONO_W32HANDLE_EVENT
:
322 case MONO_W32HANDLE_NAMEDEVENT
:
325 SetLastError (ERROR_INVALID_HANDLE
);
329 if (!mono_w32handle_lookup (handle
, type
, (gpointer
*)&event_handle
)) {
330 g_warning ("%s: error looking up %s handle %p",
331 __func__
, mono_w32handle_get_typename (type
), handle
);
335 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: resetting %s handle %p",
336 __func__
, mono_w32handle_get_typename (type
), handle
);
338 mono_w32handle_lock_handle (handle
);
340 if (!mono_w32handle_issignalled (handle
)) {
341 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: no need to reset %s handle %p",
342 __func__
, mono_w32handle_get_typename (type
), handle
);
344 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: obtained write lock on %s handle %p",
345 __func__
, mono_w32handle_get_typename (type
), handle
);
347 mono_w32handle_set_signal_state (handle
, FALSE
, FALSE
);
350 event_handle
->set_count
= 0;
352 mono_w32handle_unlock_handle (handle
);
358 ves_icall_System_Threading_Events_CloseEvent_internal (gpointer handle
)
360 CloseHandle (handle
);
364 ves_icall_System_Threading_Events_OpenEvent_internal (MonoString
*name
, gint32 rights G_GNUC_UNUSED
, gint32
*error
)
369 *error
= ERROR_SUCCESS
;
371 /* w32 seems to guarantee that opening named objects can't race each other */
372 mono_w32handle_namespace_lock ();
374 utf8_name
= g_utf16_to_utf8 (mono_string_chars (name
), -1, NULL
, NULL
, NULL
);
376 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: Opening named event [%s]", __func__
, utf8_name
);
378 handle
= mono_w32handle_namespace_search_handle (MONO_W32HANDLE_NAMEDEVENT
, utf8_name
);
379 if (handle
== INVALID_HANDLE_VALUE
) {
380 /* The name has already been used for a different object. */
381 *error
= ERROR_INVALID_HANDLE
;
383 } else if (!handle
) {
384 /* This name doesn't exist */
385 *error
= ERROR_FILE_NOT_FOUND
;
389 mono_trace (G_LOG_LEVEL_DEBUG
, MONO_TRACE_IO_LAYER
, "%s: returning named event handle %p", __func__
, handle
);
394 mono_w32handle_namespace_unlock ();
399 MonoW32HandleNamespace
*
400 mono_w32event_get_namespace (MonoW32HandleNamedEvent
*event
)
402 return &event
->sharedns
;