📄 read.cpp
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#include "prwlock.h"#include <fcntl.h>#include <iostream> using namespace std; int main(){ int fd = open("for_rwlock",O_RDONLY | O_CREAT,0644); cout<<"before enter reed lock\n"; if(Prwlock::rlock(fd)<0) { cout<<"rlock error\n"; return -1; } cout<<"*** enter read lock ***\n"; sleep(3); Prwlock::unlock(fd); cout<<"leave read lock\n"; close(fd);}
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