Changeset 5e801dc in mainline for uspace/lib/c/generic/async/server.c

Timestamp:

2019-02-25T14:42:38Z (6 years ago)

Author:

GitHub <noreply@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

a4e78743

Parents:

ee8d4d6

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2019-02-25 14:42:38)

git-committer:

GitHub <noreply@…> (2019-02-25 14:42:38)

Message:

Indicate and enforce constness of hash table key in certain functions (#158)

The assumption here is that modifying key in the hash/equal functions in something completely unexpected, and not something you would ever want to do intentionally, so it makes sense to disallow it entirely to get that extra level of checking.

File:

• uspace/lib/c/generic/async/server.c (modified) (4 diffs)

uspace/lib/c/generic/async/server.c

@@ -231 +231 @@
 static sysarg_t notification_avail = 0;
 
-static size_t client_key_hash(void *key)
-{
-        task_id_t in_task_id = *(task_id_t *) key;
-        return in_task_id;
+static size_t client_key_hash(const void *key)
+{
+        const task_id_t *in_task_id = key;
+        return *in_task_id;
 }
 
@@ -243 +243 @@
 }
 
-static bool client_key_equal(void *key, const ht_link_t *item)
-{
-        task_id_t in_task_id = *(task_id_t *) key;
+static bool client_key_equal(const void *key, const ht_link_t *item)
+{
+        const task_id_t *in_task_id = key;
         client_t *client = hash_table_get_inst(item, client_t, link);
-        return in_task_id == client->in_task_id;
+        return *in_task_id == client->in_task_id;
 }
 
@@ -490 +490 @@
 }
 
-static size_t notification_key_hash(void *key)
-{
-        sysarg_t id = *(sysarg_t *) key;
-        return id;
+static size_t notification_key_hash(const void *key)
+{
+        const sysarg_t *id = key;
+        return *id;
 }
 
@@ -503 +503 @@
 }
 
-static bool notification_key_equal(void *key, const ht_link_t *item)
-{
-        sysarg_t id = *(sysarg_t *) key;
+static bool notification_key_equal(const void *key, const ht_link_t *item)
+{
+        const sysarg_t *id = key;
         notification_t *notification =
             hash_table_get_inst(item, notification_t, htlink);
-        return id == notification->imethod;
+        return *id == notification->imethod;
 }