short sem_op; （信号量操作）
这是一个“等待为0” 的操作，可以用它来获取信号量。
This is a "wait-for-zero" operation and can be used to acquire a semaphore.
这种策略要求您了解基本操作系统内核提供的机制，并在程序逻辑中利用这些机制设计信号量使用方法。
This tactic requires that you review what the base OS kernel provides or advises in terms of designing the use of semaphores within your program logic.
在一个信号量保护大量数据时，如果一个或多个任务使用它进行写操作，这个信号量就会成为系统瓶颈。
When a semaphore protects a large amount of data, assuming one or more tasks USES it on a write basis, the semaphore becomes a bottleneck within the system.
要新创建一个信号量集，您可以将使用IPC_CREAT来设置位操作或访问权限。
To create a new set, you can set bit-wise or the access permissions with IPC_CREAT.
在锁住信号量到释放信号量之间，要仔细考虑执行的代码量、执行的操作类型、发出的函数调用和循环次数。
After securing the lock, remain aware of the amount of code executed, the type of operations performed, the function calls made, and the amount of looping until releasing the lock.
介绍了该操作系统的内核、存储器管理和分区、分配策略、多任务调度及任务间通过信号量和消息处理进行通信的机制、中断管理等。
Introduce the kernel, memory management and partition, allocation strategy, multi-task scheduling and how to communicate by semaphore and message handling as well as interrupt management.
操作系统中，进程同步和互斥问题以及与之相关的信号量机制是教学过程中的重点和难点问题。
The process synchronization and process mutual exclusion and semaphore mechanism, which are emphases and difficulty in the Operating System course.
另外，平台在内存控制块的互斥操作采用的是信号量机制，这些都进一步保证了平台的安全性。
Additionally, the mechanism applied in the memory control block of the platform and the mutex is signal mechanism, Such ensures the safety of the platform further.
另外，平台在内存控制块的互斥操作采用的是信号量机制，这些都进一步保证了平台的安全性。
Additionally, the mechanism applied in the memory control block of the platform and the mutex is signal mechanism, Such ensures the safety of the platform further.
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