Tom Tresansky <******@****.***> 1715641965 -0400

│       ├── src
│       │   └──...
│       └── build.gradle    // <3>
├── shared
│   ├── src
│   │   └──...
│   └── build.gradle
└── settings.gradle
----
<1> Create the `MyCustomTask` task.
<2> A shared build script.
<3> Uses the `MyCustomTask` task and shared build script.
=====

In the `buildSrc`, the build script `shared.gradle(.kts)` is created.

package unix

import "unsafe"

// SysvShmAttach attaches the Sysv shared memory segment associated with the
// shared memory identifier id.
func SysvShmAttach(id int, addr uintptr, flag int) ([]byte, error) {
	addr, errno := shmat(id, addr, flag)
	if errno != nil {
		return nil, errno
	}

	// Retrieve the size of the shared memory to enable slice creation
	var info SysvShmDesc

    C++ source 'hello:cpp'
        srcDir: src/hello/cpp

Binaries
    Shared library 'hello:sharedLibrary'
        build using task: :helloSharedLibrary
        build type: build type 'debug'
        flavor: flavor 'default'
        target platform: platform 'current'
        tool chain: Tool chain 'clang' (Clang)
        shared library file: build/libs/hello/shared/libhello.dylib
    Static library 'hello:staticLibrary'

import javax.annotation.concurrent.ThreadSafe;
import java.io.File;
import java.util.Optional;

/**
 * Manages the shared services that are scoped to a particular Gradle user home dir and which can be shared by multiple build invocations. These shared services also include the global services.
 *
 * <p>A plugin can contribute shared services to this scope by providing an implementation of {@link GradleModuleServices}.
 */
@ThreadSafe

        given:
        createLock(Exclusive)

        when:
        createLock(Shared)

        then:
        thrown(IllegalStateException)
    }

    def "cannot lock twice in single process for shared mode"() {
        given:
        createLock(Shared)

        when:
        createLock(Shared)

        then:
        thrown(IllegalStateException)
    }

        expect:
        emptyDir.assertDoesNotExist()

        when:
        def cache = new DefaultPersistentDirectoryCache(emptyDir, "<display-name>", properties, mode(FileLockManager.LockMode.Shared), initializationAction, cacheCleanup, lockManager, Mock(ExecutorFactory), buildOperationRunner)
        try {
            cache.open()
        } finally {
            cache.close()
        }

        then:

        result == cache
        1 * cacheFactory.open(sharedCacheDir, null, [:], mode(Shared), _, NO_CLEANUP) >> cache
        0 * cacheFactory._
    }

    void createsGlobalCacheWithProperties() {
        when:
        builder.withProperties(properties).open()

        then:
        1 * cacheFactory.open(sharedCacheDir, null, properties, mode(Shared), _, NO_CLEANUP) >> cache
    }

                return backingCache
            }
        }
    }

    def "acquires lock on open and releases on close when lock mode is shared"() {
        def access = newAccess(Shared)

        when:
        access.open()

        then:
        1 * lockManager.lock(lockFile, mode(Shared), "<display-name>") >> lock
        1 * initializationAction.requiresInitialization(lock) >> false
        _ * lock.state
        0 * _._

            signal.trigger()
        }

        where:
        lockMode << [Exclusive, Shared]
    }

    def "cannot acquire lock with mode #lockMode while another lock manager in same process is holding shared lock"() {
        given:
        def file = tmpDir.file("lock-file.bin")
        createLock(Shared, file)

        when:
        createLock(lockMode, file, manager2)

        then: