C++ (Cpp) get_shared_area示例

示例#1

文件： sys_parisc.c 项目： JacksonZhangkun/linux-2.6

unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
		unsigned long len, unsigned long pgoff, unsigned long flags)
{
	if (len > TASK_SIZE)
		return -ENOMEM;
	if (!addr)
		addr = TASK_UNMAPPED_BASE;

	if (filp) {
		addr = get_shared_area(filp->f_mapping, addr, len, pgoff);
	} else if(flags & MAP_SHARED) {
		addr = get_shared_area(NULL, addr, len, pgoff);
	} else {
		addr = get_unshared_area(addr, len);
	}
	return addr;
}

示例#2

文件： sys_parisc.c 项目： CSCLOG/beaglebone

unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
		unsigned long len, unsigned long pgoff, unsigned long flags)
{
	if (len > TASK_SIZE)
		return -ENOMEM;
	/* Might want to check for cache aliasing issues for MAP_FIXED case
	 * like ARM or MIPS ??? --BenH.
	 */
	if (flags & MAP_FIXED)
		return addr;
	if (!addr)
		addr = TASK_UNMAPPED_BASE;

	if (filp) {
		addr = get_shared_area(filp->f_mapping, addr, len, pgoff);
	} else if(flags & MAP_SHARED) {
		addr = get_shared_area(NULL, addr, len, pgoff);
	} else {
		addr = get_unshared_area(addr, len);
	}
	return addr;
}