File PackageKit-add-mutex-lock-to-protect-backend-pr... of Package PackageKit

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File PackageKit-add-mutex-lock-to-protect-backend-priv-eulas.patch of Package PackageKit (Revision b8ae90f3122e7ff9b34c2b686d1e6e51)

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From 1b028d0598224fbb1510355c4a7dee7d25873872 Mon Sep 17 00:00:00 2001
From: Jonathan Kang <jonathankang@gnome.org>
Date: Fri, 8 Mar 2019 21:44:08 +0800
Subject: [PATCH] Add mutex lock to protect backend->priv->eulas (#303)

pk_is_thread_default() check was introduced in commit 44bd3ab6 to
detect possible threading problems.

Some backends need call pk_backend_is_eula_valid() in a thread which is
not the default one to perform EULA related actions. This way
pk_is_thread_default() check fails.

Fix that by removing the pk_is_thread_default() checks in related
functions and add mutex lock to avoid eulas to be accessed in multiple
threads at the same time.

Fixes #300
---
 src/pk-backend.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/pk-backend.c b/src/pk-backend.c
index 38f32a04c..c05f6c0cd 100644
--- a/src/pk-backend.c
+++ b/src/pk-backend.c
@@ -189,6 +189,7 @@ struct PkBackendPrivate
 	gchar			*name;
 	gpointer		 file_changed_data;
 	GHashTable		*eulas;
+	GMutex			 eulas_mutex;
 	GModule			*handle;
 	PkBackendDesc		*desc;
 	PkBackendFileChanged	 file_changed_func;
@@ -935,10 +936,12 @@ void
 pk_backend_accept_eula (PkBackend *backend, const gchar *eula_id)
 {
 	gpointer present;
+	g_autoptr(GMutexLocker) locker = NULL;
+
+	locker = g_mutex_locker_new (&backend->priv->eulas_mutex);
 
 	g_return_if_fail (PK_IS_BACKEND (backend));
 	g_return_if_fail (eula_id != NULL);
-	g_return_if_fail (pk_is_thread_default ());
 
 	present = g_hash_table_lookup (backend->priv->eulas, eula_id);
 	if (present != NULL) {
@@ -952,10 +955,12 @@ gboolean
 pk_backend_is_eula_valid (PkBackend *backend, const gchar *eula_id)
 {
 	gpointer present;
+	g_autoptr(GMutexLocker) locker = NULL;
+
+	locker = g_mutex_locker_new (&backend->priv->eulas_mutex);
 
 	g_return_val_if_fail (PK_IS_BACKEND (backend), FALSE);
 	g_return_val_if_fail (eula_id != NULL, FALSE);
-	g_return_val_if_fail (pk_is_thread_default (), FALSE);
 
 	present = g_hash_table_lookup (backend->priv->eulas, eula_id);
 	if (present != NULL)
@@ -969,9 +974,11 @@ pk_backend_get_accepted_eula_string (PkBackend *backend)
 	GString *string;
 	GList *l;
 	g_autoptr(GList) keys = NULL;
+	g_autoptr(GMutexLocker) locker = NULL;
+
+	locker = g_mutex_locker_new (&backend->priv->eulas_mutex);
 
 	g_return_val_if_fail (PK_IS_BACKEND (backend), FALSE);
-	g_return_val_if_fail (pk_is_thread_default (), FALSE);
 
 	/* optimise for the common case */
 	if (g_hash_table_size (backend->priv->eulas) == 0)
@@ -1065,6 +1072,7 @@ pk_backend_finalize (GObject *object)
 	g_key_file_unref (backend->priv->conf);
 	g_hash_table_destroy (backend->priv->eulas);
 
+	g_mutex_clear (&backend->priv->eulas_mutex);
 	g_mutex_clear (&backend->priv->thread_hash_mutex);
 	g_hash_table_unref (backend->priv->thread_hash);
 	g_free (backend->priv->desc);
@@ -1708,6 +1716,7 @@ pk_backend_init (PkBackend *backend)
 							    g_direct_equal,
 							    NULL,
 							    g_free);
+	g_mutex_init (&backend->priv->eulas_mutex);
 	g_mutex_init (&backend->priv->thread_hash_mutex);
 }
 
-- 
2.21.0

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File PackageKit-add-mutex-lock-to-protect-backend-priv-eulas.patch of Package PackageKit (Revision b8ae90f3122e7ff9b34c2b686d1e6e51)

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