gx

chenyc

2025-02-12 ea42ff3ebee1eeb3fb29423aa848a249441db81c

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/**
 * @license
 * Copyright 2018 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
import { ENGINE } from '../engine';
import { isPromise } from '../util';
export const OP_SCOPE_SUFFIX = '__op';
/**
 * Used for wrapping functions that perform math operations on
 * Tensors. The function will be wrapped in a named scope that cleans all
 * memory usage after the function is done.
 */
export function op(f) {
    const keys = Object.keys(f);
    if (keys.length !== 1) {
        throw new Error(`Please provide an object with a single key ` +
            `(operation name) mapping to a function. Got an object with ` +
            `${keys.length} keys.`);
    }
    let opName = keys[0];
    const fn = f[opName];
    // Strip the underscore from the end of the function name.
    if (opName.endsWith('_')) {
        opName = opName.substring(0, opName.length - 1);
    }
    // add an __op suffix to distinguish ops from kernels in tf.profile
    opName = opName + OP_SCOPE_SUFFIX;
    // tslint:disable-next-line:no-any
    const f2 = (...args) => {
        ENGINE.startScope(opName);
        try {
            const result = fn(...args);
            if (isPromise(result)) {
                console.error('Cannot return a Promise inside of tidy.');
            }
            ENGINE.endScope(result);
            return result;
        }
        catch (ex) {
            ENGINE.endScope(null);
            throw ex;
        }
    };
    Object.defineProperty(f2, 'name', { value: opName, configurable: true });
    // tslint:disable-next-line:no-any
    return f2;
}
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