1 files changed, 89 insertions, 0 deletions
diff --git a/libjava/jni-libjvm.cc b/libjava/jni-libjvm.cc
new file mode 100644
index 000000000..1833eb7f3
--- /dev/null
+++ b/libjava/jni-libjvm.cc
@@ -0,0 +1,89 @@
+// jni-libjvm.cc - an implementation of the JNI invocation API.
+
+/* Copyright (C) 2006  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+#include <gcj/cni.h>
+#include <gcj/javaprims.h>
+#include <java-assert.h>
+#include <jvm.h>
+#include <jni.h>
+
+using namespace gcj;
+
+// Forward declarations.
+extern struct JNIInvokeInterface_ _Jv_JNI_InvokeFunctions;
+extern jint JNICALL _Jv_JNI_AttachCurrentThread (JavaVM *vm,
+                                                 void **penv, void *args);
+extern JavaVM *_Jv_the_vm;
+
+jint JNICALL
+JNI_GetDefaultJavaVMInitArgs (void *args)
+{
+  jint version = * (jint *) args;
+  // Here we only support 1.2 and 1.4.
+  if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_4)
+    return JNI_EVERSION;
+
+  JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
+  ia->version = JNI_VERSION_1_4;
+  ia->nOptions = 0;
+  ia->options = NULL;
+  ia->ignoreUnrecognized = true;
+
+  return 0;
+}
+
+jint JNICALL
+JNI_CreateJavaVM (JavaVM **vm, void **penv, void *args)
+{
+  JvAssert (! _Jv_the_vm);
+
+  jint version = * (jint *) args;
+  // We only support 1.2 and 1.4.
+  if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_4)
+    return JNI_EVERSION;
+
+  JvVMInitArgs* vm_args = reinterpret_cast<JvVMInitArgs *> (args);
+
+  jint result = _Jv_CreateJavaVM (vm_args);
+  if (result)
+    return result;
+
+  // FIXME: synchronize
+  JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
+  if (nvm == NULL)
+    return JNI_ERR;
+  nvm->functions = &_Jv_JNI_InvokeFunctions;
+
+  jint r =_Jv_JNI_AttachCurrentThread (nvm, penv, NULL);
+  if (r < 0)
+    return r;
+
+  _Jv_the_vm = nvm;
+  *vm = _Jv_the_vm;
+
+  return 0;
+}
+
+jint JNICALL
+JNI_GetCreatedJavaVMs (JavaVM **vm_buffer, jsize buf_len, jsize *n_vms)
+{
+  if (buf_len <= 0)
+    return JNI_ERR;
+
+  // We only support a single VM.
+  if (_Jv_the_vm != NULL)
+    {
+      vm_buffer[0] = _Jv_the_vm;
+      *n_vms = 1;
+    }
+  else
+    *n_vms = 0;
+  return 0;
+}