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authorknu <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2007-02-10 20:33:50 +0000
committerknu <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2007-02-10 20:33:50 +0000
commit2a7ec27be2f17b74ea8383316d6948a3b3334ad9 (patch)
treee63f226e58748ea03b6a819fb8f41281fba445fe /ext
parentf9c378051a6d29e7680f2172926417981666ad4c (diff)
* ext/thread/thread.c (rb_thread_exclusive): Implement
Thread.exclusive. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@11694 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext')
-rw-r--r--ext/thread/thread.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/ext/thread/thread.c b/ext/thread/thread.c
index a70f8b7..b2aa7a9 100644
--- a/ext/thread/thread.c
+++ b/ext/thread/thread.c
@@ -18,6 +18,38 @@ static VALUE rb_cConditionVariable;
static VALUE rb_cQueue;
static VALUE rb_cSizedQueue;
+static VALUE
+thread_exclusive_do()
+{
+ rb_thread_critical = Qtrue;
+
+ return rb_yield(Qundef);
+}
+
+static VALUE
+thread_exclusive_ensure(val)
+ VALUE val;
+{
+ rb_thread_critical = val;
+
+ return Qundef;
+}
+
+/*
+ * call-seq:
+ * Thread.exclusive { block } => obj
+ *
+ * Wraps a block in Thread.critical, restoring the original value
+ * upon exit from the critical section, and returns the value of the
+ * block.
+ */
+
+static VALUE
+rb_thread_exclusive()
+{
+ return rb_ensure(thread_exclusive_do, Qundef, thread_exclusive_ensure, rb_thread_critical);
+}
+
typedef struct _Entry {
VALUE value;
struct _Entry *next;
@@ -1067,6 +1099,8 @@ dummy_dump(VALUE self)
void
Init_thread(void)
{
+ rb_define_singleton_method(rb_cThread, "exclusive", rb_thread_exclusive, 0);
+
rb_cMutex = rb_define_class("Mutex", rb_cObject);
rb_define_alloc_func(rb_cMutex, rb_mutex_alloc);
rb_define_method(rb_cMutex, "marshal_load", dummy_load, 1);