mmap

Mmap (): Maps a shared memory region into the process 's memory .

mmap（）：把共享内存段映射到进程的内存。

The parameters passed to mmap () must not conflict with the access requested during open () .

传递给mmap（）的参数必须不能与open（）时请求的访问相冲突。

The mmap () needs to supply the size of the file as the number of bytes to map .

mmap（）需要为映射提供文件的大小（字节数）。

The driver will perform hardware register accesses and advanced programming by making use of mmap (), for example .

例如，这个驱动程序可能会通过利用mmap（）来访问硬件寄存器并进行高级编程。

Linux uses the shmget / mmap function to access files by directly incorporating file data into memory .

Linux使用shmget/mmap函数通过直接将文件数据合并入内存来访问文件。

However , this improvement doesn 't come without a price ; there are hidden pitfalls when using the mmap + write method .

然而，性能的改进需要付出代价的；是用mmap与write这种组合方法，存在着一些隐藏的陷阱。

Here , however , we are only concerned with mmap 's ability to add mapped RAM to our process .

不过，在这里，我们只关心mmap向进程添加被映射的内存的能力。

Below is the Win32 sample code , and the equivalent of the Linux mmap implementation , to create a shared memory resource .

下面是创建共享内存资源的Win32示例代码，以及相对应的Linuxnmap实现。

As you can see , either brk () or mmap () can be used to add additional virtual memory to our processes .

如您所见，brk（）或者mmap（）都可以用来向我们的进程添加额外的虚拟内存。

Mmap : mmap (), or " memory map ," is like brk () but is much more flexible .

mmap：mmap（），或者说是“内存映像”，类似于brk（），但是更为灵活。

A related problem is caused by applications that try to load code at an absolute address by calling mmap with the flag MAP_FIXED .

应用程序试图通过调用带有MAPFIXED标志的mmap从绝对地址加载代码时会产生一个相关问题。

Mmap () annexes the shared memory segment and returns a pointer suitable for reading and writing bytes directly from the segment .

mmap（）连接共享内存段，返回用于对内存段直接读写字节的指针。

A discussion of those options is beyond the scope of this introduction ; consult the mmap () documentation for your operating system for specifics . )

对这些操作的讨论超出了本文的范围；具体方法请查阅操作系统的mmap（）文档。

The munmap subroutine only unmaps regions created from calls to the mmap subroutine .

munmap子例程只是取消对mmap子例程的调用而创建的区域的映射。

GNU Memory-Mapped Malloc ( part of GDB ) is a malloc implementation that is based on mmap () .

Hoard是一个为多线程应用程序优化的malloc实现。

Within a driver , the mmap function is implemented through the remap_pfn_range kernel function , which provides a linear mapping of device memory into a user 's address space .

在一个驱动程序中，mmap函数通过remappfnrange内核函数实现，它提供设备内存到用户地址空间的线性映射。

Munmap () does the reverse of mmap () .

munmap（）所做的事情与mmap（）相反。

That applies MMAP based file directory improved addressing method and hash table based URL filter to web content audit system , can improve the rate of the duplicated URL judgment and filtering . Finally , this paper implements a web content audit system .

将基于MMAP改进的文件目录寻址法和基于哈希表的URL过滤器结合应用于网络内容审计系统中，能够提高重复URL判定和过滤的速度。最后，本文实现了一个网络内容审计系统。

The discrete-time MMAP [ K ] / PH [ K ] / 1 queueing system with reneging is discussed , where there is K types of the customers , patient time of different customers is a discrete random variable and follows differently general distribution .

讨论了带中途退出的离散时间MMAP[K]/PH[K]/1排队系统，其中系统含有K种类型的顾客，不同类型顾客的耐心时间服从不同的一般离散型分布。