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 Readme for:  Development » Library » Misc » libpsem.lha

libpsem

Description: POSIX semaphore implementation
Download: libpsem.lha       (TIPS: Use the right click menu if your browser takes you back here all the time)
Size: 176kb
Version: 20221203
Date: 04 Dec 22
Author: Fredrik Wikström
Submitter: Fredrik Wikström
Email: fredrik/a500 org
Category: development/library/misc
Replaces: development/library/misc/libpsem.lha
License: BSD
Distribute: yes
Min OS Version: 4.0
FileID: 12326
 
Comments: 0
Snapshots: 0
Videos: 0
Downloads:  (Current version)

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A simple AmigaOS native implementation of POSIX semaphores that can easily be
linked into any program that needs them (just add -lpsem to LIBS).

So far the following functions are supported by the library:
- sem_init()
- sem_destroy()
- sem_trywait()
- sem_wait()
- sem_timedwait()
- sem_post()
- sem_getvalue()

Installation is just a matter of opening a CLI and doing:
Copy SDK/#? ALL SDK:

The complete source code is also included in the archive under a 2-clause BSD
license.

Changes since the last release:

- Added missing cleanup code for the timer request on success in
  sem_timedwait().
- Rewrote the wait loops and made the code more safe.
- sem_getvalue() now returns a negative value if there are programs waiting on
  the semaphore.
- Added a clib2 compile of the static library.


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