This module introduces 4D’s synchronization mechanisms: signals and semaphores.
These tools enable you to coordinate several processes working in parallel, avoid access conflicts to shared resources and guarantee smooth processing in a multi-process environment.

Often overlooked or misunderstood, signals and semaphores are nevertheless fundamental concepts when developing more complex applications, with simultaneous execution, workers or parallel operations.
This module clarifies their respective roles, their scope (local vs. global) and the best practices for using them effectively, without creating blockages or unnecessary waits.

Objective: understand when and how to synchronize processes in 4D to obtain a fluid, robust and predictable application.