Commit Graph

8 Commits

Author SHA1 Message Date
Zhang Zhaolong
e30d1c0f47 libwinpr: fix incorrect usage of realloc.
Signed-off-by: Zhang Zhaolong <zhangzl2013@126.com>
2015-03-11 14:59:56 +08:00
Armin Novak
2671482458 Fixed Stack_Free. 2014-11-16 16:48:50 +01:00
Hardening
6febe88026 Fixes for queue and stack
This patch does misc fixes in queue and stack:
* the *_new() were not handling OOM correctly ;
* the *_Contains() methods were not using the equals cb;
* the lock were not always taken when accessing internal members;
2014-04-18 16:27:51 +02:00
Norbert Federa
3a58934eb2 libwinpr-utils: Use criticalsection with spincount
Use InitializeCriticalSectionAndSpinCount instead of IntializeCriticalSection.
Using spin counts for critical sections of short duration enables the calling
thread to avoid the wait operation in most situations which can dramatically
improve the overall performance on multiprocessor systems.

On Linux this change has no effect because the new winpr critical section
implementation does not use the SpinCount field under Linux because the NPTL
synchronization primitives are implemented using the extremely performant
futex system calls which have this magic already built in.

However, on Mac OS X this change improved the overall performance of the
multithreaded RemoteFX decoder by 25 percent.

I've used a SpinCount of 4000 which avoided 99 percent of the wait calls.
This value is also used by Microsoft's heap manager for its per-heap
critical sections.

Note: This change requires pull request #1397 to be merged.
2013-08-07 18:16:01 +02:00
Norbert Federa
81ef251fc8 winpr: improve and fix locking for data structures
- Improved/completed(almost) winpr's critical section implementation
- Replaced WaitForSingleObject locking with critical sections

Note:
WaitForSingleObject should _never_ be used for granular low-contention
locks as it _always_ enters the kernel.

Just replacing WaitForSingleObject locking in Bufferpool with
EnterCriticalSection boosts the multithreaded rfx decoder
performance by almost 400% on win32.
2013-08-02 12:07:05 +02:00
Marc-André Moreau
d9ac2cca39 libfreerdp-gdi: fix 8bpp FillRect color 2013-02-03 15:16:37 -05:00
Marc-André Moreau
5a131688e4 libwinpr-utils: implement ArrayList 2012-12-05 17:24:01 -05:00
Marc-André Moreau
c06c0fe665 libwinpr-utils: stubbed Queue, Stack and ArrayList 2012-11-30 16:13:19 -05:00