skip_lock.c

下载程序,多线程下载,断点续传. 目前只能下http

#include <skip_lock.h>
	
int skip_lock(struct skiplock *skip_lock) {
	int ret;
	__asm__ __volatile__(
		"xchg %0, %1"
		:"=r" (ret), "=m" (skip_lock->lock)
		:"0" (1) : "memory"
		);
	return ret;
}	
	
void skip_unlock(struct skiplock *skip_lock) {
	skip_lock->lock = 0;
}