commit | a9e4d4446556a605e2e86b38b5df8d21b1959f88 | [log] [tgz] |
---|---|---|
author | Saleem Abdulrasool <compnerd@compnerd.org> | Wed Feb 13 08:15:24 2019 -0800 |
committer | Saleem Abdulrasool <compnerd@compnerd.org> | Wed Feb 13 09:38:55 2019 -0800 |
tree | d0427366f7beb6b72b8e7675b1a02476c0c34909 | |
parent | ff3bf517715414fc163ed03f715dcff95c94e5ab [diff] |
Revert "Use numericCast() to get the correct type when creating a dispatch_block_flags_t." This (partially) reverts commit b048490a717e08b27b835750f0f6f631f0e8af0d. Unfortunately, the numeric cast'ed value cannot be used to construct the dispatch_flags_t type. Trying to change to an explicit construction also fails. This repairs the Windows build for the time being. Use the `numericCast` for other targets.
Grand Central Dispatch (GCD or libdispatch) provides comprehensive support for concurrent code execution on multicore hardware.
libdispatch is currently available on all Darwin platforms. This project aims to make a modern version of libdispatch available on all other Swift platforms. To do this, we will implement as much of the portable subset of the API as possible, using the existing open source C implementation.
libdispatch on Darwin is a combination of logic in the xnu
kernel alongside the user-space Library. The kernel has the most information available to balance workload across the entire system. As a first step, however, we believe it is useful to bring up the basic functionality of the library using user-space pthread primitives on Linux. Eventually, a Linux kernel module could be developed to support more informed thread scheduling.
A port of libdispatch to Linux has been completed. On Linux, since Swift 3, swift-corelibs-libdispatch has been included in all Swift releases and is used by other swift-corelibs projects.
Opportunities to contribute and on-going work include:
For detailed instructions on building and installing libdispatch, see INSTALL.md
For detailed instructions on testing libdispatch, see TESTING.md