即惰性初始化（lazy initialization）。自 C++11 起，局部static变量的初始化是线程安全的，保证多个线程同时调用函数时，变量只会被初始化一次。2. 动态库中的static变量初始化 当你使用dlopen动态加载动态库时：全局static变量的初始化通常是在dlopen加载库时立刻完成，而不需要等待函数调用
静态变量需要在.cpp初始化,否则报错连接错误, 对于原始数据, int, double, … simple.h classSimple { public: Simple(void); ~Simple(void); staticintGetInt(void); private: staticint_i; }; simple.cpp intSimple::GetInt(void) { return_i; } 连接出错: error LNK2001: unresolved external symbol "...
静态变量需要在.cpp初始化,否则报错连接错误, 对于原始数据, int, double, … simple.h classSimple { public: Simple(void); ~Simple(void); staticintGetInt(void); private: staticint_i; }; simple.cpp intSimple::GetInt(void) { return_i; } 连接出错: error LNK2001: unresolved external symbol "...
它们是在函数第一次被调用时才会初始化，即惰性初始化（lazy initialization）。自 C++11 起，局部stati...
```c // The IA64/generic ABI uses the first byte of the guard variable. // The ARM EABI uses the least significant bit. // Thread-safe static local initialization support. #ifdef __GTHREADS namespace { // static_mutex is a single mutex controlling all static initializations. // This...
return 1; // This thread should do the initialization. } if (expected == guard_bit) { // Already initialized. return 0; } if (expected == pending_bit) { // Use acquire here. int newv = expected | waiting_bit; // 0x10100 ...
9Solving the "Static Initialization Order Fiasco" SIOF是存储时期为 static 的这类数据在跨 TUs 时相互依赖所导致的问题,因为不同 TUs 中的这些数据初始化顺序没有规定,引用的数据可能还没初始化。 因此全局变量、静态变量、静态成员变量都可能会引起这个问题。
# or remove the initializationinthe declarationofvariable. 上述代码仿真结果为: 代码语言:javascript 复制 # @1def_cnt=1# @2def_cnt=2 ex6: 代码语言:javascript 复制 functionintdef_cnt_auto(input a);automatic int cnt=0;cnt+=a;returncnt;endfunction$display("@1 def_cnt_auto = %0d",def_cnt...
I currently work at a project that uses a MC9S08SH16 micro and I have a question about variable initialization at start-up. I used the following code #define DEFINED_VAR void nameFunction1(void) { static unsigned char var1 = DEFINED_VAR; if(var1 != 0) { --var1;...
There are several actions that are part of static initialization. Those actions take place in the following order: Static fields are set to 0. This is typically done by the runtime. Static field initializers run. The static field initializers in the most derived type run. Base type static fi...