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HAProxy - Load balancer
f509065191
For a long time we've had fdtab[].ev and fdtab[].state which contain two arbitrary sets of information, one is mostly the configuration plus some shutdown reports and the other one is the latest polling status report which also contains some sticky error and shutdown reports. These ones used to be stored into distinct chars, complicating certain operations and not even allowing to clearly see concurrent accesses (e.g. fd_delete_orphan() would set the state to zero while fd_insert() would only set the event to zero). This patch creates a single uint with the two sets in it, still delimited at the byte level for better readability. The original FD_EV_* values remained at the lowest bit levels as they are also known by their bit value. The next step will consist in merging the remaining bits into it. The whole bits are now cleared both in fd_insert() and _fd_delete_orphan() because after a complete check, it is certain that in both cases these functions are the only ones touching these areas. Indeed, for _fd_delete_orphan(), the thread_mask has already been zeroed before a poller can call fd_update_event() which would touch the state, so it is certain that _fd_delete_orphan() is alone. Regarding fd_insert(), only one thread will get an FD at any moment, and it as this FD has already been released by _fd_delete_orphan() by definition it is certain that previous users have definitely stopped touching it. Strictly speaking there's no need for clearing the state again in fd_insert() but it's cheap and will remove some doubts during some troubleshooting sessions. |
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| admin | ||
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| dev | ||
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| include | ||
| reg-tests | ||
| scripts | ||
| src | ||
| tests | ||
| .cirrus.yml | ||
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| .travis.yml | ||
| BRANCHES | ||
| CHANGELOG | ||
| CONTRIBUTING | ||
| INSTALL | ||
| LICENSE | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
| ROADMAP | ||
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| VERDATE | ||
| VERSION | ||
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)