NAME

Global::MutexLock - A xs module to give perl global mutex-lock between crons or web-app's workers

SYNOPSIS

use Global::MutexLock;

DESCRIPTION

Global::MutexLock is a module to create os-level global mutex-lock for perl.
You can lock anything between process to others, or web-applications, or threads,cron.

Mutex-lock's pointer is stored in System V IPC.
You should let the process to know the IPC-ID for locking.

If you want to delete IPC-ID by yourself, please use 'ipcs','ipcrm'.

USAGE

# 0. use Global::MutexLock;

  use Global::MutexLock qw(mutex_create mutex_destory mutex_lock mutex_unlock);

# 1. create a new global mutex id
# tips: you can create an id, and use it in different crons or apps

  my $mutex_id = mutex_create();

# 2. take a lock

  unless (mutex_lock($mutex_id)) {  
      warn "lock error";  
  }

# 3. do something...
# ...

# 4. release lock

  unless (mutex_unlock($mutex_id)) {  
      warn "release lock error";  
  }

# 5. destory mutex lock id
# you must do it. otherwise the IPC id will be leaved in system.
# or you can rm it by `ipcrm -m IPCID`
# you can find IPCID by `ipcs`

  mutex_destory($mutex_id);

LICENSE

AUTHOR