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      1 /*
      2  * Copyright (c) 2015-2016 Cyril Hrubis <chrubis (at) suse.cz>
      3  *
      4  * This program is free software: you can redistribute it and/or modify
      5  * it under the terms of the GNU General Public License as published by
      6  * the Free Software Foundation, either version 2 of the License, or
      7  * (at your option) any later version.
      8  *
      9  * This program is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     12  * GNU General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU General Public License
     15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
     16  */
     17 
     18  /*
     19 
     20    Checkpoint - easy to use parent-child synchronization.
     21 
     22    Checkpoint is based on futexes (man futex). The library allocates a page of
     23    shared memory for futexes and the id is an offset to it which gives the user
     24    up to page_size/sizeof(uint32_t) checkpoint pairs. Up to INT_MAX processes
     25    can sleep on single id and can be woken up by single wake.
     26 
     27   */
     28 
     29 #ifndef OLD_CHECKPOINT__
     30 #define OLD_CHECKPOINT__
     31 
     32 #include "test.h"
     33 #include "tst_checkpoint_fn.h"
     34 
     35 /*
     36  * Checkpoint initializaton, must be done first.
     37  *
     38  * NOTE: tst_tmpdir() must be called beforehand.
     39  */
     40 #define TST_CHECKPOINT_INIT(cleanup_fn) \
     41 	tst_checkpoint_init(__FILE__, __LINE__, cleanup_fn)
     42 
     43 #define TST_SAFE_CHECKPOINT_WAIT(cleanup_fn, id) \
     44         tst_safe_checkpoint_wait(__FILE__, __LINE__, cleanup_fn, id);
     45 
     46 #define TST_SAFE_CHECKPOINT_WAKE(cleanup_fn, id) \
     47         tst_safe_checkpoint_wake(__FILE__, __LINE__, cleanup_fn, id, 1);
     48 
     49 #define TST_SAFE_CHECKPOINT_WAKE2(cleanup_fn, id, nr_wake) \
     50         tst_safe_checkpoint_wake(__FILE__, __LINE__, cleanup_fn, id, nr_wake);
     51 
     52 #define TST_SAFE_CHECKPOINT_WAKE_AND_WAIT(cleanup_fn, id) \
     53         tst_safe_checkpoint_wake(__FILE__, __LINE__, cleanup_fn, id, 1); \
     54         tst_safe_checkpoint_wait(__FILE__, __LINE__, cleanup_fn, id);
     55 
     56 #endif /* OLD_CHECKPOINT__ */
     57