boost::shared_lock 的类提供了非独占锁,这个类必须和 boost::shared_mutex 型的互斥量一起使用。boost::shared_mutex它允许线程获取多个共享所有权和一个专享所有权,它比mutex的代价高很多。通过lock_shared()或try_lock_shared()获取共享所有权,使用unlock_shared()来释放共享所有权。 ...boost...
根据提示,需要在CMakeLists.txt中手动关闭boost动态链接库,我们在CMakeLists.txt文件 find_package(Boost REQUIRED COMPONENTS filesystem) 1. 上面添加下面两行代码: set(Boost_USE_STATIC_LIBS OFF) set(Boost_USE_STATIC_RUNTIME OFF) 1. 2. 编译通过。
可以看到create有n个重载,还都有模板参数,这是借鉴了boost::make_shared的实现,对传递的构造函数的参数做了一次转发。 可以看到create的参数都是常量引用,那么如果构造函数接受的参数是非常量引用怎么办?make_shared给出了解决方案,在这里http://www.boost.org/doc/libs/1_59_0/libs/smart_ptr/make_shared.html...
一、使用智能指针std::shared_ptr实现 一个最朴素的想法是,使用智能指针管理节点。事实上,如果平台支持std::atomic_is_lock_free(&some_shared_ptr)实现返回true,那么所有内存回收问题就都迎刃而解了(我在X86和Arm平台测试,均返回false)。示例代码(文件命名为lock_free_stack.h)如下: #pragmaonce#include#include...
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Using access() on a non-existing file is faster than using open(). So we do this first. If it succeeds we do almost twice the work but this does not matter, since it is not for production use. */ static const char preload_file[] = "/etc/ld.so.preload"; if (__builtin_expect...
Ceph is a distributed object, block, and file storage platform - win32_build.sh: use ENABLE_SHARED=ON by default · cbodley/ceph@4ec8e99
I am getting the same issue but I need to do static and not shared MFC Dll. My project was originally in VC2005 where I can build both with shared MFC dll or static build ("Use MFC in a Static Library"). After opening and converting it it in VC2010 I get this error with st...
by both the loadable library and the application executable as they will be unique and different. To use a unique static variable, you must pass a pointer to that static variable to the other module so that each module (main executable and DLL library) can use the same instantiation. On ...
using boost::shared_ptr; class A { public: ~A(){ cout<<"destroy \n";} void do_sth(){cout<<"do somthing\n";} }; int main() { shared_ptr<A> a1(new A()); cout<<"the sample now has "<<a1.use_count()<<" references \n"; ...