}
		procs.waits[ret.pid] = waitc
		procs.Unlock()

		forkc <- ret

		var w waitErr
		for w.err == nil && w.Pid != ret.pid {
			w.err = Await(&w.Waitmsg)
		}
		waitc <- &w
		close(waitc)
	}()
	ret := <-forkc
	return ret.pid, ret.err
}

// Combination of fork and exec, careful to be thread safe.

     */
    @Input
    public boolean isFork() {
        return fork;
    }

    /**
     * Sets whether to run the Groovy compiler in a separate process. Defaults to {@code true}.
     */
    public void setFork(boolean fork) {
        this.fork = fork;
    }

    /**

        javaCompile.destinationDirectory.fileValue(new File('somewhere'))
        def invalidExecutable = temporaryFolder.file("invalidExecutable")

        when:
        javaCompile.options.fork = true
        javaCompile.options.forkOptions.executable = invalidExecutable
        javaCompile.createSpec()

        then:
        def e = thrown(AbstractProperty.PropertyQueryException)

func TestEPIPE(t *testing.T) {
	// This test cannot be run in parallel because of a race similar
	// to the one reported in https://go.dev/issue/22315.
	//
	// Even though the pipe is opened with O_CLOEXEC, if another test forks in
	// between the call to os.Pipe and the call to r.Close, that child process can
	// retain an open copy of r's file descriptor until it execs. If one of our
	// Write calls occurs during that interval it can spuriously succeed,

     */
    @Input
    public boolean isFork() {
        return fork;
    }

    /**
     * Sets whether to run the compiler in its own process. Note that this does
     * not necessarily mean that a new process will be created for each compile task.
     * Defaults to {@code false}.
     */
    public void setFork(boolean fork) {
        this.fork = fork;
    }

    /**

func runtime_AfterFork()
func runtime_AfterForkInChild()

// Fork, dup fd onto 0..len(fd), and exec(argv0, argvv, envv) in child.
// If a dup or exec fails, write the errno error to pipe.
// (Pipe is close-on-exec so if exec succeeds, it will be closed.)
// In the child, this function must not acquire any locks, because
// they might have been locked at the time of the fork. This means
// no rescheduling, no malloc calls, and no new stack segments.

        buildFile << """
            apply plugin: 'java'
            ${mavenCentralRepository()}
            dependencies { ${testImplementationConfiguration} 'junit:junit:4.13' }
            compileTestJava.options.fork = true  // forked as 'Gradle Test Executor 1'
        """

        file("src/test/java/example/MyTest.java") << """
            package example;
            public class MyTest {

            compileJava {
                options.fork = true
                options.forkOptions.executable = "${TextUtil.normaliseFileSeparators(jdk.javacExecutable.absolutePath)}"
            }
        """
    }

    private TestFile configureForkOptionsJavaHome(Jvm jdk) {
        buildFile << """
            compileJava {
                options.fork = true

                compileScala {
                    options.fork = true
                    options.forkOptions.executable = "${TextUtil.normaliseFileSeparators(otherJdk.javaExecutable.absolutePath)}"
                }
            """
        } else {
            buildFile << """
                compileScala {
                    options.fork = true

                compileGroovy {
                    options.fork = true
                    options.forkOptions.executable = "${TextUtil.normaliseFileSeparators(otherJdk.javaExecutable.absolutePath)}"
                }
            """
        } else {
            buildFile << """
                compileGroovy {
                    options.fork = true