From b401b023225b09d469e616786c60f165a0d2f9ef Mon Sep 17 00:00:00 2001
From: Angel Ortega <angel@triptico.com>
Date: Wed, 1 Dec 2010 12:16:11 +0100
Subject: [PATCH] New functions mpdm_void() and mpdm_is_null().

---
 mpdm.h   |  3 +++
 mpdm_t.c |  6 +-----
 mpdm_v.c | 37 +++++++++++++++++++++++++++++++++++--
 3 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/mpdm.h b/mpdm.h
index 937f7ee..6101f14 100644
--- a/mpdm.h
+++ b/mpdm.h
@@ -89,6 +89,9 @@ int mpdm_size(const mpdm_t v);
 mpdm_t mpdm_clone(const mpdm_t v);
 mpdm_t mpdm_root(void);
 
+void mpdm_void(mpdm_t v);
+int mpdm_is_null(mpdm_t v);
+
 mpdm_t mpdm_exec(mpdm_t c, mpdm_t args, mpdm_t ctxt);
 mpdm_t mpdm_exec_1(mpdm_t c, mpdm_t a1, mpdm_t ctxt);
 mpdm_t mpdm_exec_2(mpdm_t c, mpdm_t a1, mpdm_t a2, mpdm_t ctxt);
diff --git a/mpdm_t.c b/mpdm_t.c
index 0f46b19..a039b05 100644
--- a/mpdm_t.c
+++ b/mpdm_t.c
@@ -250,11 +250,7 @@ void mpdm_semaphore_post(mpdm_t sem)
 static void thread_caller(mpdm_t a)
 {
 	/* ignore return value */
-	mpdm_unref(
-        mpdm_ref(
-            mpdm_exec(mpdm_aget(a, 0), mpdm_aget(a, 1), mpdm_aget(a, 2))
-        )
-    );
+	mpdm_void(mpdm_exec(mpdm_aget(a, 0), mpdm_aget(a, 1), mpdm_aget(a, 2)));
 
 	/* was referenced in mpdm_exec_thread() */
 	mpdm_unref(a);
diff --git a/mpdm_v.c b/mpdm_v.c
index 24cfeb3..5450d9b 100644
--- a/mpdm_v.c
+++ b/mpdm_v.c
@@ -213,7 +213,7 @@ mpdm_t mpdm_root(void)
 
 
 /**
- * mpdm_set_ival - Sets the integer value
+ * mpdm_set_ival - Sets the integer value.
  * @v: the value
  * @ival: the integer
  *
@@ -231,7 +231,7 @@ mpdm_t mpdm_set_ival(mpdm_t v, int ival)
 
 
 /**
- * mpdm_set_rval - Sets the real value
+ * mpdm_set_rval - Sets the real value.
  * @v: the value
  * @rval: the real
  *
@@ -249,6 +249,39 @@ mpdm_t mpdm_set_rval(mpdm_t v, double rval)
 
 
 /**
+ * mpdm_void - Refs then unrefs a value.
+ * @v: the value
+ *
+ * References and unreferences a value. To be used to receive
+ * the output of mpdm_exec() in case of it being void (i.e.
+ * its return value ignored).
+ */
+void mpdm_void(mpdm_t v)
+{
+	mpdm_ref(v);
+	mpdm_unref(v);
+}
+
+
+/**
+ * mpdm_is_null - Returns 1 if a value is NULL.
+ * @v: the value
+ *
+ * Returns 1 if a value is NULL. The reference count is touched.
+ */
+int mpdm_is_null(mpdm_t v)
+{
+	int r;
+
+	mpdm_ref(v);
+	r = v == NULL ? 1 : 0;
+	mpdm_unref(v);
+
+	return r;
+}
+
+
+/**
  * mpdm_exec - Executes an executable value.
  * @c: the code value
  * @args: the arguments
-- 
2.11.4.GIT