27.windows Threads

1.windows Threads

A Windows thread is an instance of code that can be executed. The system dispatches the program on a thread-by-unit.

A program can have multiple threads for multitasking.

Features of 2.windows threads

(1) thread has an ID

(2) thread has its own security attributes

(3) Each thread has its own memory stack

(4) Each thread has its own register information

3. Process multi-tasking and threading multitasking

Process multitasking: Each process uses a private address space

Thread multitasking: Multiple threads within a process use the same address space

Thread invocation: Divides the execution time of the CPU into a time slice, sequentially executing different threads according to the time slice

Thread polling: Thread A, thread B-a ...

4. Thread Usage

(1) Defining threading functions

DWORD WINAPI ThreadProc (LPVOID lpparameter);

(2) Create thread

HANDLE CreateThread (lpsecurity_attributes lpthreadattributes,//Security properties

size_t dwstacksize,//thread stack size

Lpthread_start_routine lpstartaddress,//thread handling function address

LPVOID Lpparameter,//parameters passed to the threading function

DWORD dwcreationflags,//Creation mode

Lpdword Lpthreadid); Create successful, return thread ID

27.windows Threads