我的任务目标：复制特定的非系统线程(实际上是协作线程)安全模块,以创建系统线程安全版本,以支持系统中的不同需求.但是,我们决定创建一个命名空间来保护C头文件中的系统线程版本,而不是创建sys_XXX函数以保持兼容性.我实际上可以将它包含在CPP文件中并愉快地工作但我刚刚意识到我的funcInit调用在它到达CPP文件控件之前没有被调用.不幸的是,协作线程版本的这个init在C文件中.现在我需要从同一个地方初始化我的系统线程安全版本,但我已被编译错误阻止,这是我知道很难解决的.

编译错误日志： –

In file included from sysinit.c:87:
sys_unicode.h:39: error: expected '=',',';','asm' or '__attribute__' before 'SystemThreadUtils' <== corresponds to line [namespace SystemThreadUtils {]
sysinit.c:88:
sysinit.c:512: error: expected identifier or '(' before string constant <== corresponds to line [extern "C" bool SystemThreadUtils::funcInit(void);]
sysinit.c:513: error: expected identifier or '(' before string constant <== corresponds to line [extern "C" bool SystemThreadUtils::funcTerm(void);]
sysinit.c: In function 'SysInit':
sysinit.c:817: error: 'SystemThreadUtils' undeclared (first use in this function) <= corresponds to line [SystemThreadUtils::funcInit();]
sysinit.c:817: error: (Each undeclared identifier is reported only once
sysinit.c:817: error: for each function it appears in.)
sysinit.c:817: error: expected ')' before ':' token
sysinit.c: In function 'SysTerm':
sysinit.c:2737: error: expected expression before ':' token <== corresponds to line [SystemThreadUtils::funcTerm();]
sysinit.c:2737: warning: label 'SystemThreadUtils' defined but not used

来源和标题摘要FYI： –

C头文件(unicode.h)：

// all functions called from the C source file
funcInit();
funcA();
funcB();
funcTerm();

C头文件(unicode.c)：

// all functions called from the C source file
funcInit() {
}
funcA() {
}
funcB() {
}
funcTerm() {
}

C头文件(sys_unicode.h)：

#include "unicode.h"
namespace SystemThreadUtils {

    // below functions called from the C source file
    extern "C" funcInit();
    extern "C" funcTerm();

    // below functions called from the CPP source file
    funcA();
    funcB();
}

C源定义(sys_unicode.cpp)：

#include "sys_unicode.h"

namespace SystemThreadUtils {

    // below functions are called from C source
    funcInit() {
    }
    funcTerm() {
    }

    // below methods are called from CPP source
    funcA() {
    }
    funcB() {
    }
}

CPP源#1(utils.cpp)：

#include "sys_unicode.h"

using namespace SystemThreadUtils;

utils::utils_init()
{
   funcA();
   funcB();
}

C源#2(sysinit.c)：

#include "sys_unicode.h"

extern "C" bool SystemThreadUtils::funcInit(void);
extern "C" bool SystemThreadUtils::funcTerm(void);

SysInit ()
{
   funcInit(); // non system thread safe version
   SystemThreadUtils::funcInit();  // system thread safe version
}
SysTerm ()
{
   funcTerm(); // non system thread safe version
   SystemThreadUtils::funcTerm();  // system thread safe version
}