```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...
在C++memory model中对static local variable,说道:The initialization of such a variable is defined to occur the first time control passes through its declaration; for multiple threads calling the function, this means there’s the potential for a race condition to define first. 局部静态变量不仅只会...
If control enters the declaration concurrently while the variable is being initialized, the concurrent execution shall wait for completion of the initialization.8 也就是说线程B执行到正在线程A中初始化的静态变量时,要等待完成。这规定了构造函数的锁定等待特性。 在3.6.3 Termination [basic.start.term] 第...
localstatic.c:2: error: initializer element is not constant localstatic.c: In function ‘bar’: localstatic.c:5: error: initializer element is not constant [tsecer@Harry localstatic]$ g++ localstatic.c -c [tsecer@Harry localstatic]$ objdump -rdCh localstatic.o localstatic.o: file format ...
原因是这解决了一类重要问题，那就是static变量的初始化顺序的问题。C++只能保证在同一个文件中声明的...
(vlog-2244) Variable 'cnt' is implicitly static. You must either explicitly declare it as static or automatic # or remove the initialization in the declaration of variable. 上述代码仿真结果为: 代码语言:javascript 代码运行次数:0 复制Cloud Studio 代码运行 # @1 def_cnt = 1 # @2 def_cnt =...
// you don't need to capture a global variable [] {returnx; }; } 但如果是局部变量,由于它的存储时期为 automatic,就必须捕获才能使用: intmain{ intx =42; // you have to capture a local variable [&x] {returnx; }; } 但如果使用 static 修饰该局部变量,就无需再进行捕获: ...
2 How to implement thread safe local static variable in C++03? 2 LoadLibrary Static/Globals and Threads Related 8 Can threads be safely created during static initialization? 27 Is C++ static member variable initialization thread-safe? 10 C++0x static initializations and thread safety 10 In C++...
If control enters the declaration concurrently while the variable is being initialized, the concurrent execution shall wait for completion of the initialization.8 也就是说线程B执行到正在线程A中初始化的静态变量时,要等待完成。这规定了构造函数的锁定等待特性。
This C program prints the values of x and z. z is global, accessible in main() and fun(), while a is local. #include<stdio.h>// Include the standard input-output libraryintz=30;// Global variablevoidfun();// Function prototype for fun()intmain(){intx=10;// Local variableprintf...