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Improve InnoDB synchronization primitives on Windows

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This patch was originally developed by Vladislav Vaintroub.
The main changes are:

 * Use TryEnterCriticalSection in os_fast_mutex_trylock().
 * Use lightweight condition variables on Vista or later Windows;
   but fall back to events on older Windows, such as XP.

This patch also fixes the following bugs:
  bug# 52102 InnoDB Plugin shows performance drop compared to InnoDB
             on Windows
  bug# 53204 os_fastmutex_trylock is implemented incorrectly on Windows

rb://363 approved by Inaam Rana
This commit is contained in:
Calvin Sun
2010-07-20 15:42:31 -05:00
parent 17fd8dec1d
commit 0802e5da69
11 changed files with 349 additions and 291 deletions
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3
storage/innobase/include/srv0srv.h
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@ -112,6 +112,9 @@ OS (provided we compiled Innobase with it in), otherwise we will
use simulated aio we build below with threads.
Currently we support native aio on windows and linux */
extern my_bool srv_use_native_aio;
#ifdef __WIN__
extern ibool srv_use_native_conditions;
#endif
extern ulint srv_n_data_files;
extern char** srv_data_file_names;
extern ulint* srv_data_file_sizes;