static unsafe JreRuntimeOptions CreateJreVM(JreRuntimeOptions builder)
{
if (builder == null)
{
throw new ArgumentNullException("builder");
}
if (builder.InvocationPointer != IntPtr.Zero)
{
return(builder);
}
var args = new JavaVMInitArgs()
{
version = builder.JniVersion,
nOptions = builder.Options.Count + 1,
ignoreUnrecognized = builder.IgnoreUnrecognizedOptions ? (byte)1 : (byte)0,
};
var options = new JavaVMOption [builder.Options.Count + 1];
try {
for (int i = 0; i < builder.Options.Count; ++i)
{
options [i].optionString = Marshal.StringToHGlobalAnsi(builder.Options [i]);
}
var classPath = Marshal.StringToHGlobalAnsi(string.Format("-Djava.class.path={0}", string.Join(Path.PathSeparator.ToString(), builder.ClassPath)));
options [builder.Options.Count].optionString = classPath;
fixed(JavaVMOption *popts = options)
{
args.options = (IntPtr)popts;
IntPtr javavm;
IntPtr jnienv;
int r = JNI_CreateJavaVM(out javavm, out jnienv, ref args);
if (r != 0)
{
var message = string.Format(
"The JDK supports creating at most one JVM per process, ever; " +
"do you have a JVM running already, or have you already created (and destroyed?) one? " +
"(JNI_CreateJavaVM returned {0}).",
r);
throw new NotSupportedException(message);
}
builder.InvocationPointer = javavm;
builder.EnvironmentPointer = jnienv;
builder.DestroyRuntimeOnDispose = true;
return(builder);
}
} finally {
for (int i = 0; i < options.Length; ++i)
{
Marshal.FreeHGlobal(options [i].optionString);
}
}
}
internal protected JreRuntime(JreRuntimeOptions builder)
: base(CreateJreVM(builder))
{
}
static unsafe JreRuntimeOptions CreateJreVM(JreRuntimeOptions builder)
{
if (builder == null)
{
throw new ArgumentNullException("builder");
}
bool onMono = Type.GetType("Mono.Runtime", throwOnError: false) != null;
if (onMono)
{
builder.ValueManager = builder.ValueManager ?? new MonoRuntimeValueManager();
builder.ObjectReferenceManager = builder.ObjectReferenceManager ?? new MonoRuntimeObjectReferenceManager();
}
else
{
builder.ValueManager = builder.ValueManager ?? new ManagedValueManager();
builder.ObjectReferenceManager = builder.ObjectReferenceManager ?? new ManagedObjectReferenceManager(builder.JniGlobalReferenceLogWriter, builder.JniLocalReferenceLogWriter);
}
if (builder.InvocationPointer != IntPtr.Zero)
{
return(builder);
}
if (!string.IsNullOrEmpty(builder.JvmLibraryPath))
{
IntPtr errorPtr = IntPtr.Zero;
int r = NativeMethods.java_interop_jvm_load_with_error_message(builder.JvmLibraryPath !, out errorPtr);
if (r != 0)
{
string error = Marshal.PtrToStringAnsi(errorPtr);
NativeMethods.java_interop_free(errorPtr);
throw new Exception($"Could not load JVM path `{builder.JvmLibraryPath}`: {error} ({r})!");
}
}
var args = new JavaVMInitArgs()
{
version = builder.JniVersion,
nOptions = builder.Options.Count + 1,
ignoreUnrecognized = builder.IgnoreUnrecognizedOptions ? (byte)1 : (byte)0,
};
var options = new JavaVMOption [builder.Options.Count + 1];
try {
for (int i = 0; i < builder.Options.Count; ++i)
{
options [i].optionString = Marshal.StringToHGlobalAnsi(builder.Options [i]);
}
var classPath = Marshal.StringToHGlobalAnsi(string.Format("-Djava.class.path={0}", string.Join(Path.PathSeparator.ToString(), builder.ClassPath)));
options [builder.Options.Count].optionString = classPath;
fixed(JavaVMOption *popts = options)
{
args.options = (IntPtr)popts;
IntPtr javavm;
IntPtr jnienv;
int r = CreateJavaVM(out javavm, out jnienv, ref args);
if (r != 0)
{
var message = string.Format(
"The JDK supports creating at most one JVM per process, ever; " +
"do you have a JVM running already, or have you already created (and destroyed?) one? " +
"(JNI_CreateJavaVM returned {0}).",
r);
throw new NotSupportedException(message);
}
builder.InvocationPointer = javavm;
builder.EnvironmentPointer = jnienv;
return(builder);
}
} finally {
for (int i = 0; i < options.Length; ++i)
{
Marshal.FreeHGlobal(options [i].optionString);
}
}
}