static void Initialize()
{
lock (locked)
{
if (!isInitialized)
{
bool unicode = false;
IntPtr envhp;
OCI.MODE environmentMode = (OCI.MODE.OCI_THREADED | OCI.MODE.OCI_OBJECT); // NOTE: cannot be NO_MUTEX because we might be multi-threaded.
//1 TODO: we only use this environment handle in the OracleNumber class,
//1 which doesn't have logic to determine whether we need Unicode or not;
//1 we should modify OracleNumber to have that logic, but it's only for
//1 consistency -- nothing will break
#if NEVER
if (OCI.ClientVersionAtLeastOracle9i)
{
unicode = true;
environmentMode |= OCI.MODE.OCI_UTF16;
}
#endif //0
int rc = TracedNativeMethods.OCIEnvCreate(
out envhp, // envhpp
environmentMode, // mode
ADP.NullHandleRef, // ctxp
ADP.NullHandleRef, // malocfp
ADP.NullHandleRef, // ralocfp
ADP.NullHandleRef, // mfreefp
0, // xtramemsz
ADP.NullHandleRef // usrmempp
);
if (rc != 0 || envhp == IntPtr.Zero)
{
throw ADP.OperationFailed("OCIEnvCreate", rc);
}
environmentHandle = new OciEnvironmentHandle(envhp, unicode);
availableErrorHandle = new OciErrorHandle(environmentHandle);
isInitialized = true;
}
}
}
protected OciHandle(OciHandle parentHandle, OCI.HTYPE handleType, OCI.MODE ocimode, HANDLEFLAG handleflags) : this()
{
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
int num;
this._handleType = handleType;
this._parentHandle = parentHandle;
this._refCount = 1;
switch (handleType)
{
case OCI.HTYPE.OCI_DTYPE_TIMESTAMP:
case OCI.HTYPE.OCI_DTYPE_TIMESTAMP_TZ:
case OCI.HTYPE.OCI_DTYPE_TIMESTAMP_LTZ:
case OCI.HTYPE.OCI_DTYPE_INTERVAL_DS:
case OCI.HTYPE.OCI_DTYPE_FIRST:
case OCI.HTYPE.OCI_DTYPE_ROWID:
case OCI.HTYPE.OCI_DTYPE_FILE:
num = TracedNativeMethods.OCIDescriptorAlloc(parentHandle.EnvironmentHandle, out this.handle, handleType);
if ((num != 0) || (IntPtr.Zero == base.handle))
{
throw System.Data.Common.ADP.OperationFailed("OCIDescriptorAlloc", num);
}
break;
case OCI.HTYPE.OCI_HTYPE_ENV:
if ((handleflags & HANDLEFLAG.NLS) != HANDLEFLAG.NLS)
{
num = TracedNativeMethods.OCIEnvCreate(out this.handle, ocimode);
if ((num != 0) || (IntPtr.Zero == base.handle))
{
throw System.Data.Common.ADP.OperationFailed("OCIEnvCreate", num);
}
}
else
{
num = TracedNativeMethods.OCIEnvNlsCreate(out this.handle, ocimode, 0, 0);
if ((num != 0) || (IntPtr.Zero == base.handle))
{
throw System.Data.Common.ADP.OperationFailed("OCIEnvNlsCreate", num);
}
}
break;
case OCI.HTYPE.OCI_HTYPE_ERROR:
case OCI.HTYPE.OCI_HTYPE_SVCCTX:
case OCI.HTYPE.OCI_HTYPE_STMT:
case OCI.HTYPE.OCI_HTYPE_SERVER:
case OCI.HTYPE.OCI_HTYPE_SESSION:
num = TracedNativeMethods.OCIHandleAlloc(parentHandle.EnvironmentHandle, out this.handle, handleType);
if ((num != 0) || (IntPtr.Zero == base.handle))
{
throw System.Data.Common.ADP.OperationFailed("OCIHandleAlloc", num);
}
break;
}
if (parentHandle != null)
{
parentHandle.AddRef();
this._isUnicode = parentHandle.IsUnicode;
}
else
{
this._isUnicode = (handleflags & HANDLEFLAG.UNICODE) == HANDLEFLAG.UNICODE;
}
}
}
