True or False? PThreads is only a specifification, not an implementation.
时间: 2024-05-24 19:12:05 浏览: 12
True. PThreads is a specification for thread behavior in C programming language, but it is not an implementation itself. It is up to the operating system or library to provide an implementation of the PThreads specification.
相关问题
PThreads is typically only implemented on UNIX-like systems.
This statement is mostly true. PThreads (short for POSIX threads) is a standard API for creating and synchronizing threads in a multi-threaded application. It is defined by the POSIX standard, which is a set of APIs and interfaces for Unix and Unix-like operating systems. Therefore, PThreads is typically implemented on UNIX-like systems such as Linux, macOS, and FreeBSD. However, there are also PThreads implementations available for non-Unix systems, such as Windows and VxWorks.
looking for pthread_create in pthreads - not found
在POSIX线程库(pthreads)中使用pthread_create函数时,出现"not found"的错误表明无法找到该函数的定义或实现。这可能是由于以下问题导致的:
1. 缺少链接库:pthreads库未正确链接到程序中。解决方法是在编译时添加-lpthread选项,以确保链接正确的库文件。
2. 包含头文件错误:未正确包含pthread.h头文件,导致编译器无法识别pthread_create函数的声明。解决方法是在代码中添加#include <pthread.h>以包含正确的头文件。
3. 编译器不支持pthread库:某些编译器可能不支持POSIX线程库。这种情况下,无法使用pthread_create函数。可以尝试使用其他编译器或检查编译器的版本以确定是否支持pthreads库。
4. 操作系统不支持pthread库:某些操作系统可能不支持POSIX线程。在这种情况下,pthread_create函数无法使用。可以选择使用其他线程库或考虑更换操作系统。
总之,当出现"not found"错误时,需要检查编译时的链接库、头文件是否正确,以及编译器和操作系统是否支持pthreads库。如果问题仍然存在,可能需要进一步查找其他可能的原因或寻求专业的技术支持。
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