条件变量 c++ windows

Question

我正在尝试运行从 Windows Dev Center 复制一些代码，但在一些未解析的标识符上一直遇到错误。这听起来可能很愚蠢，但为什么这些行会导致此错误：

CONDITION_VARIABLE BufferNotEmpty;
CONDITION_VARIABLE BufferNotFull;

和 "not declared in this scope" 在其他类似的行上：

SleepConditionVariableCS (&BufferNotFull, &BufferLock, INFINITE);

当我包含所有 headers（或至少我认为）必要的内容时？

#include <mutex>
#include <condition_variable>
#include <cstdint>
#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <WinBase.h>

运行项目配置为 C++11 的 NetBeans，以防发生任何更改。如果有人有任何建议，请提前致谢！

编辑：

错误输出：

cd 'C:\Users\Linda\Documents\NetBeansProjects\CppApplication_2'
C:\MinGW\msys.0\bin\make.exe -f Makefile CONF=Debug
"/C/MinGW/msys/1.0/bin/make.exe" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make.exe[1]: Entering directory `/c/Users/Linda/Documents/NetBeansProjects/CppApplication_2'
"/C/MinGW/msys/1.0/bin/make.exe"  -f nbproject/Makefile-Debug.mk dist/Debug/MinGW-Windows/cppapplication_2.exe
make.exe[2]: Entering directory `/c/Users/Linda/Documents/NetBeansProjects/CppApplication_2'
mkdir -p build/Debug/MinGW-Windows
rm -f "build/Debug/MinGW-Windows/conditional_var.o.d"
g++ -std=c++11   -c -g -std=c++11 -MMD -MP -MF "build/Debug/MinGW-Windows/conditional_var.o.d" -o build/Debug/MinGW-Windows/conditional_var.o conditional_var.cpp
conditional_var.cpp:20:1: error: 'CONDITION_VARIABLE' does not name a type
 CONDITION_VARIABLE BufferNotEmpty;
 ^
conditional_var.cpp:21:1: error: 'CONDITION_VARIABLE' does not name a type
 CONDITION_VARIABLE BufferNotFull;
 ^
conditional_var.cpp: In function 'DWORD ProducerThreadProc(PVOID)':
conditional_var.cpp:43:40: error: 'BufferNotFull' was not declared in this scope
             SleepConditionVariableCS (&BufferNotFull, &BufferLock, INFINITE);
                                        ^
conditional_var.cpp:43:76: error: 'SleepConditionVariableCS' was not declared in this scope
             SleepConditionVariableCS (&BufferNotFull, &BufferLock, INFINITE);
                                                                            ^
conditional_var.cpp:64:33: error: 'BufferNotEmpty' was not declared in this scope
         WakeConditionVariable (&BufferNotEmpty);
                                 ^
conditional_var.cpp:64:47: error: 'WakeConditionVariable' was not declared in this scope
         WakeConditionVariable (&BufferNotEmpty);
                                               ^
conditional_var.cpp: In function 'DWORD ConsumerThreadProc(PVOID)':
conditional_var.cpp:82:40: error: 'BufferNotEmpty' was not declared in this scope
             SleepConditionVariableCS (&BufferNotEmpty, &BufferLock, INFINITE);
                                        ^
conditional_var.cpp:82:77: error: 'SleepConditionVariableCS' was not declared in this scope
             SleepConditionVariableCS (&BufferNotEmpty, &BufferLock, INFINITE);
                                                                             ^
conditional_var.cpp:111:33: error: 'BufferNotFull' was not declared in this scope
         WakeConditionVariable (&BufferNotFull);
                                 ^
conditional_var.cpp:111:46: error: 'WakeConditionVariable' was not declared in this scope
         WakeConditionVariable (&BufferNotFull);
                                              ^
conditional_var.cpp: In function 'int main()':
conditional_var.cpp:124:35: error: 'BufferNotEmpty' was not declared in this scope
     InitializeConditionVariable (&BufferNotEmpty);
                                   ^
conditional_var.cpp:124:49: error: 'InitializeConditionVariable' was not declared in this scope
     InitializeConditionVariable (&BufferNotEmpty);
                                                 ^
conditional_var.cpp:125:35: error: 'BufferNotFull' was not declared in this scope
     InitializeConditionVariable (&BufferNotFull);
                                   ^
conditional_var.cpp:141:45: error: 'WakeAllConditionVariable' was not declared in this scope
     WakeAllConditionVariable (&BufferNotFull);
                                             ^
make.exe[2]: *** [build/Debug/MinGW-Windows/conditional_var.o] Error 1
make.exe[2]: Leaving directory `/c/Users/Linda/Documents/NetBeansProjects/CppApplication_2'
make.exe[1]: *** [.build-conf] Error 2
make.exe[1]: Leaving directory `/c/Users/Linda/Documents/NetBeansProjects/CppApplication_2'
make.exe": *** [.build-impl] Error 2

BUILD FAILED (exit value 2, total time: 4s)

Answer 1

如果你添加会发生什么

#include <SDKDDKVer.h>

在 #include <windows.h>?

之前

CONDITION_VARIABLE 定义应由 <windows.h> 引入，但前提是针对 Vista 或更新版本构建。 <sdkddkver.h> 应确保您始终针对 SDK 支持的最新目标进行构建。

如果这没有帮助，或者找不到 <sdkddkver.h>，则意味着您的构建环境使用的是非常陈旧的 SDK。我不知道 NetBeans/mingw 的 Windows SDK 使用什么，所以他们使用过时的版本是很有可能的。

如果证明是这种情况，那么我认为您最好的选择是使用 Visual Studio 2015 或 2017 社区版以及当前的 Windows 10 SDK。

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