This function finds a class of given name from the set
of already loaded classes. It is needed to implement some
VMClassLoader natives.
Signed-off-by: Tomek Grabiec <tgrab...@gmail.com>
---
include/vm/classloader.h | 1 +
vm/classloader.c | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/include/vm/classloader.h b/include/vm/classloader.h
index fdf457c..b4289a3 100644
--- a/include/vm/classloader.h
+++ b/include/vm/classloader.h
@@ -12,5 +12,6 @@ int try_to_add_zip_to_classpath(const char *zip);
struct vm_class *classloader_load(const char *class_name);
struct vm_class *classloader_load_primitive(const char *class_name);
+struct vm_class *classloader_find_class(const char *name);
#endif
diff --git a/vm/classloader.c b/vm/classloader.c
index 173dd78..18a1322 100644
--- a/vm/classloader.c
+++ b/vm/classloader.c
@@ -537,3 +537,40 @@ struct vm_class *classloader_load(const char *class_name)
trace_pop();
return vmc;
}
+
+/**
+ * Returns class for a given name if it has already been loaded or
+ * NULL otherwise. It may block if class it being loaded.
+ */
+struct vm_class *classloader_find_class(const char *name)
+{
+ struct vm_class *vmc;
+ char *slash_class_name;
+ int class_index;
+
+ slash_class_name = dots_to_slash(name);
+ if (!slash_class_name) {
+ NOT_IMPLEMENTED;
+ return NULL;
+ }
+
+ vmc = NULL;
+
+ pthread_mutex_lock(&classloader_mutex);
+
+ class_index = lookup_class(slash_class_name);
+ if (class_index >= 0) {
+ /* If class is being loaded by another thread then wait
+ * until loading is completed. */
+ while (!classes[class_index].loaded)
+ pthread_cond_wait(&classloader_cond,
+ &classloader_mutex);
+
+ vmc = classes[class_index].class;
+ }
+
+ free(slash_class_name);
+
+ pthread_mutex_unlock(&classloader_mutex);
+ return vmc;
+}
--
1.6.0.6
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