arno/linux-insides
1
0
Fork 0
mirror of https://github.com/0xAX/linux-insides.git synced 2024-12-22 14:48:08 +00:00
Code Issues Releases Wiki Activity

Update sync-1.md

Browse Source
This commit is contained in:
0xAX 2016-04-10 20:46:53 +06:00
parent 23d7243c08
commit 9e9099cc68
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
SyncPrim/sync-1.md
View File

@ -59,7 +59,7 @@ The `spinlock` is a low-level synchronization mechanism which in simple words, r
* `acquired`;
* `free`.
Each process which wants to acquire a `spinlock`, must write a value which represents `spinlock acquired` state to this variable and write `spinlock free` state to the variable. If a process tries to execute code which is protected by a `spinlock`, it will be locked while a process which holds this lock will release it. In this case all related operations must be [atomic](https://en.wikipedia.org/wiki/Linearizability) to prevent [race conditions](https://en.wikipedia.org/wiki/Race_condition) state. The `spinlinock` is represented by the `spinlock_t` type in the Linux kernel which `spinlock_t` is [widely](http://lxr.free-electrons.com/ident?i=spinlock_t) used. The `spinlock_t` is defined as:
Each process which wants to acquire a `spinlock`, must write a value which represents `spinlock acquired` state to this variable and write `spinlock free` state to the variable. If a process tries to execute code which is protected by a `spinlock`, it will be locked while a process which holds this lock will release it. In this case all related operations must be [atomic](https://en.wikipedia.org/wiki/Linearizability) to prevent [race conditions](https://en.wikipedia.org/wiki/Race_condition) state. The `spinlinock` is represented by the `spinlock_t` type in the Linux kernel. If we will look at the Linux kernel code, we will see that this type is [widely](http://lxr.free-electrons.com/ident?i=spinlock_t) used. The `spinlock_t` is defined as:
```C
typedef struct spinlock {