-/*
- * w32handle.c: Generic and internal operations on handles
+/**
+ * \file
+ * Generic and internal operations on handles
*
* Author:
* Dick Porter (dick@ximian.com)
#undef DEBUG_REFS
-#define SLOT_MAX (1024 * 16)
+#define SLOT_MAX (1024 * 32)
/* must be a power of 2 */
#define HANDLE_PER_SLOT (256)
MonoW32HandleType type;
guint ref;
gboolean signalled;
+ gboolean in_use;
mono_mutex_t signal_mutex;
mono_cond_t signal_cond;
gpointer specific;
return handle_data->signalled;
}
+static void
+mono_w32handle_set_in_use (gpointer handle, gboolean in_use)
+{
+ MonoW32HandleBase *handle_data;
+
+ if (!mono_w32handle_lookup_data (handle, &handle_data))
+ g_assert_not_reached ();
+
+ handle_data->in_use = in_use;
+}
+
static void
mono_w32handle_lock_signal_mutex (void)
{
mono_os_mutex_unlock (&global_signal_mutex);
}
+static void
+mono_w32handle_ref (gpointer handle);
+
+static void
+mono_w32handle_unref (gpointer handle);
+
void
mono_w32handle_lock_handle (gpointer handle)
{
mono_w32handle_unref (handle);
}
-/*
- * wapi_init:
- *
- * Initialize the io-layer.
- */
void
mono_w32handle_init (void)
{
void
mono_w32handle_cleanup (void)
{
- int i, j, k;
+ int i;
g_assert (!shutting_down);
shutting_down = TRUE;
- /* Every shared handle we were using ought really to be closed
- * by now, but to make sure just blow them all away. The
- * exiting finalizer thread in particular races us to the
- * program exit and doesn't always win, so it can be left
- * cluttering up the shared file. Anything else left over is
- * really a bug.
- */
- for(i = SLOT_INDEX (0); private_handles[i] != NULL; i++) {
- for(j = SLOT_OFFSET (0); j < HANDLE_PER_SLOT; j++) {
- MonoW32HandleBase *handle_data = &private_handles[i][j];
- gpointer handle = GINT_TO_POINTER (i*HANDLE_PER_SLOT+j);
-
- for(k = handle_data->ref; k > 0; k--) {
- mono_w32handle_unref (handle);
- }
- }
- }
-
for (i = 0; i < SLOT_MAX; ++i)
g_free (private_handles [i]);
}
fd_index = SLOT_INDEX (fd);
fd_offset = SLOT_OFFSET (fd);
+ mono_os_mutex_lock (&scan_mutex);
/* Initialize the array entries on demand */
if (!private_handles [fd_index]) {
- mono_os_mutex_lock (&scan_mutex);
-
if (!private_handles [fd_index])
private_handles [fd_index] = g_new0 (MonoW32HandleBase, HANDLE_PER_SLOT);
-
- mono_os_mutex_unlock (&scan_mutex);
}
handle_data = &private_handles [fd_index][fd_offset];
if (handle_data->type != MONO_W32HANDLE_UNUSED) {
+ mono_os_mutex_unlock (&scan_mutex);
mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_W32HANDLE, "%s: failed to create %s handle, fd is already in use", __func__, mono_w32handle_ops_typename (type));
/* FIXME: clean up this handle? We can't do anything
* with the fd, cos thats the new one
mono_w32handle_init_handle (handle_data, type, handle_specific);
+ mono_os_mutex_unlock (&scan_mutex);
+
return(GUINT_TO_POINTER(fd));
}
+static gboolean
+mono_w32handle_ref_core (gpointer handle, MonoW32HandleBase *handle_data);
+
+static gboolean
+mono_w32handle_unref_core (gpointer handle, MonoW32HandleBase *handle_data);
+
+static void
+w32handle_destroy (gpointer handle);
+
+gpointer
+mono_w32handle_duplicate (gpointer handle)
+{
+ MonoW32HandleBase *handle_data;
+
+ if (handle == INVALID_HANDLE_VALUE)
+ return handle;
+ if (!mono_w32handle_lookup_data (handle, &handle_data))
+ return INVALID_HANDLE_VALUE;
+ if (handle == (gpointer) 0 && handle_data->type != MONO_W32HANDLE_CONSOLE)
+ return handle;
+
+ if (!mono_w32handle_ref_core (handle, handle_data))
+ g_error ("%s: failed to ref handle %p", __func__, handle);
+
+ return handle;
+}
+
+gboolean
+mono_w32handle_close (gpointer handle)
+{
+ MonoW32HandleBase *handle_data;
+ gboolean destroy;
+
+ if (handle == INVALID_HANDLE_VALUE)
+ return FALSE;
+ if (!mono_w32handle_lookup_data (handle, &handle_data))
+ return FALSE;
+ if (handle == (gpointer) 0 && handle_data->type != MONO_W32HANDLE_CONSOLE) {
+ /* Problem: because we map file descriptors to the
+ * same-numbered handle we can't tell the difference
+ * between a bogus handle and the handle to stdin.
+ * Assume that it's the console handle if that handle
+ * exists... */
+ return FALSE;
+ }
+
+ destroy = mono_w32handle_unref_core (handle, handle_data);
+ if (destroy)
+ w32handle_destroy (handle);
+
+ return TRUE;
+}
+
gboolean
mono_w32handle_lookup (gpointer handle, MonoW32HandleType type,
gpointer *handle_specific)
return(TRUE);
}
-static gboolean
-mono_w32handle_ref_core (gpointer handle, MonoW32HandleBase *handle_data);
-
-static gboolean
-mono_w32handle_unref_core (gpointer handle, MonoW32HandleBase *handle_data);
-
-static void
-w32handle_destroy (gpointer handle);
-
void
mono_w32handle_foreach (gboolean (*on_each)(gpointer handle, gpointer data, gpointer user_data), gpointer user_data)
{
return new == 0;
}
-void mono_w32handle_ref (gpointer handle)
+static void
+mono_w32handle_ref (gpointer handle)
{
MonoW32HandleBase *handle_data;
- if (!mono_w32handle_lookup_data (handle, &handle_data)) {
- mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_W32HANDLE, "%s: failed to ref handle %p, unknown handle", __func__, handle);
- return;
- }
+ if (!mono_w32handle_lookup_data (handle, &handle_data))
+ g_error ("%s: failed to ref handle %p, unknown handle", __func__, handle);
if (!mono_w32handle_ref_core (handle, handle_data))
g_error ("%s: failed to ref handle %p", __func__, handle);
if (!mono_w32handle_lookup_data (handle, &handle_data))
g_error ("%s: unknown handle %p", __func__, handle);
+ g_assert (!handle_data->in_use);
+
type = handle_data->type;
handle_specific = handle_data->specific;
close_func (handle, handle_specific);
}
+ memset (handle_specific, 0, mono_w32handle_ops_typesize (type));
+
g_free (handle_specific);
}
/* The handle must not be locked on entry to this function */
-void
+static void
mono_w32handle_unref (gpointer handle)
{
MonoW32HandleBase *handle_data;
gboolean destroy;
- if (!mono_w32handle_lookup_data (handle, &handle_data)) {
- mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_W32HANDLE, "%s: failed to unref handle %p, unknown handle",
- __func__, handle);
- return;
- }
+ if (!mono_w32handle_lookup_data (handle, &handle_data))
+ g_error ("%s: failed to unref handle %p, unknown handle", __func__, handle);
destroy = mono_w32handle_unref_core (handle, handle_data);
if (destroy)
type = handle_data->type;
if (handle_ops[type] != NULL && handle_ops[type]->signal != NULL) {
- handle_ops[type]->signal (handle);
+ handle_ops[type]->signal (handle, handle_data->specific);
}
}
mono_os_cond_broadcast (cond);
mono_os_mutex_unlock (mutex);
- mono_w32handle_unref (handle);
+ mono_w32handle_close (handle);
}
static int
mono_w32handle_timedwait_signal_handle (gpointer handle, guint32 timeout, gboolean poll, gboolean *alerted)
{
MonoW32HandleBase *handle_data;
+ gpointer handle_duplicate;
int res;
if (!mono_w32handle_lookup_data (handle, &handle_data))
*alerted = FALSE;
if (alerted) {
- mono_thread_info_install_interrupt (signal_handle_and_unref, handle, alerted);
- if (*alerted)
+ mono_thread_info_install_interrupt (signal_handle_and_unref, handle_duplicate = mono_w32handle_duplicate (handle), alerted);
+ if (*alerted) {
+ mono_w32handle_close (handle_duplicate);
return 0;
- mono_w32handle_ref (handle);
+ }
}
res = mono_w32handle_timedwait_signal_naked (&handle_data->signal_cond, &handle_data->signal_mutex, timeout, poll, alerted);
if (alerted) {
mono_thread_info_uninstall_interrupt (alerted);
if (!*alerted) {
- /* if it is alerted, then the handle is unref in the interrupt callback */
- mono_w32handle_unref (handle);
+ /* if it is alerted, then the handle_duplicate is closed in the interrupt callback */
+ mono_w32handle_close (handle_duplicate);
}
}
g_error ("cannot dump unknown handle %p", handle);
g_print ("%p [%7s] signalled: %5s ref: %3d ",
- handle, mono_w32handle_ops_typename (handle_data->type), handle_data->signalled ? "true" : "false", handle_data->ref);
+ handle, mono_w32handle_ops_typename (handle_data->type), handle_data->signalled ? "true" : "false", handle_data->ref - 1 /* foreach increase ref by 1 */);
mono_w32handle_ops_details (handle_data->type, handle_data->specific);
g_print ("\n");
if (timeout != MONO_INFINITE_WAIT)
start = mono_msec_ticks ();
+ mono_w32handle_set_in_use (handle, TRUE);
+
for (;;) {
gint waited;
}
done:
+ mono_w32handle_set_in_use (handle, FALSE);
+
mono_w32handle_unlock_handle (handle);
return ret;
projects / mono.git / blobdiff