How to use pthread_create function
This article mainly shows you how to use the pthread_create function. The content is simple and easy to understand. It is clearly organized. I hope it can help you solve your doubts. Let Xiaobian lead you to study and learn how to use the pthread_create function.
pthread_create is a thread-creating function for Unix-like operating systems (Unix, Linux, Mac OS X, etc.). Its function is to create a thread (in fact, determine the entry point for calling the thread function), and after the thread is created, it starts running the related thread function. Return value of pthread_create: 0 if successful; error number if error.
pthread_create function
header file
#include
function declaration
intpthread_create(pthread_t*tidp,constpthread_attr_t*attr,
void*(*start_rtn)(void*),void*arg);
compile link parameter
-lpthread
return value
If the thread is successfully created, 0 is returned. If thread creation fails, the error number is returned and the contents of *thread are undefined.
On success, the memory location pointed to by tidp is set to the thread ID of the newly created thread. The attr parameter is used to specify various thread attributes. The newly created thread runs from the address of the start_rtn function, which has only one universal pointer parameter arg. If more than one parameter needs to be passed to the start_rtn function, then these parameters need to be put into a structure, and then the address of this structure is passed as the parameter of arg.
Linux under the C language development of multi-threaded procedures, Linux system under the multi-thread follow POSIX thread interface, known as pthread.
parameters
The first parameter is a pointer to the thread identifier.
The second parameter is used to set thread properties.
The third parameter is the starting address of the thread running the function.
The last parameter is the parameter to run the function.
pthread_create Notes
Because pthread is not the default library for Linux systems, it is the POSIX thread library. It is used as a library in Linux, so add-lpthread (or-pthread) to explicitly link the library. Error messages are returned as return values when the function executes incorrectly, without modifying the system global variable errno, and of course perror() cannot be used to print error messages.
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