pevents | Win32 events for * nix platforms | Command Line Interface library

 by   neosmart C++ Version: Current License: MIT

kandi X-RAY | pevents Summary

kandi X-RAY | pevents Summary

pevents is a C++ library typically used in Utilities, Command Line Interface applications. pevents has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

While POSIX condition variables (pthread_cond_t) and WIN32 events both provide the essential building blocks of the synchronization primitives required to write multithreaded code with signaling, the nature of the differences between the two have lent their way towards creating different synchronization and multithreaded-programming paradigms. Developers accustomed to WIN32 events might have a hard time transitioning to condition variables; pevents aims to ease the transition for Windows developers looking to write multithreaded code on *nix by providing a familiar synchronization primitive that will allow them to duplicate the essential features of WIN32 auto/manual-reset events. As mentioned earlier, pevents provides most of the functionality of WIN32 events. The only features not included are only named events and support for security attributes. To the author's best knowledge, this is the only implementation of WIN32 events available for Linux and other posix platforms that provides support for simultaneously waiting on multiple events. Depending on your needs, we've been told that pevents may be used as a lightweight alternative to libuv/libev while still allowing your code to embrace asynchronous event handling with ease.
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            kandi-support Support

              pevents has a low active ecosystem.
              It has 205 star(s) with 67 fork(s). There are 17 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 2 open issues and 5 have been closed. On average issues are closed in 93 days. There are 2 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of pevents is current.

            kandi-Quality Quality

              pevents has 0 bugs and 0 code smells.

            kandi-Security Security

              pevents has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              pevents code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              pevents is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              pevents releases are not available. You will need to build from source code and install.
              Installation instructions, examples and code snippets are available.

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            pevents Key Features

            No Key Features are available at this moment for pevents.

            pevents Examples and Code Snippets

            No Code Snippets are available at this moment for pevents.

            Community Discussions

            QUESTION

            What is the first synchronization scope of vkCmdWaitEvents?
            Asked 2022-Jan-25 at 01:10

            In 7.5, the Vulkan spec says about vkCmdWaitEvents

            The first synchronization scope only includes event signal operations that operate on members of pEvents, and the operations that happened-before the event signal operations. Event signal operations performed by vkCmdSetEvent that occur earlier in submission order are included in the first synchronization scope, if the logically latest pipeline stage in their stageMask parameter is logically earlier than or equal to the logically latest pipeline stage in srcStageMask.

            I'm confused by this phrasing. Does this mean the first synchronization scope is the signalling of events that are passed in to pEvents, plus any events that are submitted earlier and meet the stage mask and submission order requirement, or is it event signals are both passed in and meet the requirement?

            In either case, since you can just pass in events with pEvents, what is srcStageMask is useful for?

            ...

            ANSWER

            Answered 2022-Jan-25 at 01:10

            The first synchronization scope only includes event signal operations that operate on members of pEvents, and the operations that happened-before the event signal operations.

            The first scope of vkCmdWaitEvents is only the hypothetical signal on the pEvent (and all the stuff that happens-before it transitively, as would be defined by whatever signaled the event).

            Event signal operations performed by vkCmdSetEvent that occur earlier in submission order are included in the first synchronization scope, [...]

            vkCmdSetEvent cannot be reordered past vkCmdWaitEvents by the driver. It would basically be a broken if it did. I.e. if you call:

            Source https://stackoverflow.com/questions/70811598

            QUESTION

            IMFTransform::SetInputType() 'MF_E_TRANSFORM_TYPE_NOT_SET '
            Asked 2022-Jan-03 at 17:33

            I am trying to set up an encoder IMFTransform. In this case, it happens to be NVENC H264 Encoder. However, IMFTransform::SetInputType() is not working for ConfigureEncoder(), and is returning MF_E_TRANSFORM_TYPE_NOT_SET. This behavior does not occur in the ConfigureColorConversion() function, despite the code being nearly identical. I have tried just about everything and it has not helped at all.

            Full project link

            ...

            ANSWER

            Answered 2022-Jan-03 at 16:16

            MF_E_TRANSFORM_TYPE_NOT_SET You must set the output types before setting the input types.

            This is behavior by design. You would normally buuild the pipeline along the data flow, but in the case of encoder it's typically reverse for reasons I am omitting here. The error code, as documented, gives you a hint that you need to SetOutputType first and then you would be able to do SetInputType.

            Even though Video Processor MFT is also an MFT, it's type setting is more relaxed.

            Source https://stackoverflow.com/questions/70544901

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install pevents

            Experimental support for building pevents via the meson build system has recently landed. Currently, this is only used to support automated building/testing of pevents core and its supporting utilities and unit tests. To repeat: do not worry about the build system, pevents is purposely written in plain C/C++ and avoids the need for complex configuration or platform-dependent build instructions.

            Support

            pevents has been used as an extremely simple and lightweight cross-platform synchronization library in code used across multiple platforms (including Windows, FreeBSD, Linux, macOS, iOS, Android, and more).
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          • HTTPS

            https://github.com/neosmart/pevents.git

          • CLI

            gh repo clone neosmart/pevents

          • sshUrl

            git@github.com:neosmart/pevents.git

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