unix,win: replace QUEUE with struct uv__queue (#4022)

Recent versions of gcc have started emitting warnings about the liberal
type casting inside the QUEUE macros. Although the warnings

unix,win: replace QUEUE with struct uv__queue (#4022)

Recent versions of gcc have started emitting warnings about the liberal
type casting inside the QUEUE macros. Although the warnings are false
positives, let's use them as the impetus to switch to a type-safer and
arguably cleaner approach.

Fixes: https://github.com/libuv/libuv/issues/4019

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zos: use destructor for uv__threadpool_cleanup() (#3376)

On z/OS, instead of calling the uv__threadpool_cleanup() function from
inside uv_library_shutdown(), the destructor attribute mus

zos: use destructor for uv__threadpool_cleanup() (#3376)

On z/OS, instead of calling the uv__threadpool_cleanup() function from
inside uv_library_shutdown(), the destructor attribute must be used;
otherwise, tests will fail with exit code 1 and no output. Additionally,
post() does not need to be called when the destructor attribute is used.

Also adds uv__os390_cleanup() function to clean System V message queue
on z/OS.

Co-authored-by: Igor Todorovski <itodorov@ca.ibm.com>
Co-authored-by: Gaby Baghdadi <baghdadi@ca.ibm.com>

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zos: use nanosleep() from zoslib

Since `nanosleep()` is implemented in ZOSLIB, we will remove the libuv
implementation to resolve conflict. The ZOSLIB implementation uses
BPX4CTW (co

zos: use nanosleep() from zoslib

Since `nanosleep()` is implemented in ZOSLIB, we will remove the libuv
implementation to resolve conflict. The ZOSLIB implementation uses
BPX4CTW (cond_timed_wait).

PR-URL: https://github.com/libuv/libuv/pull/3060
Reviewed-By: Richard Lau <rlau@redhat.com>

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zos: fix non-Release builds

z/OS doesn't support POSIX semaphores. On Release builds the code
paths that reference POSIX semaphore functions (e.g. sem_init())
are optimized away so l

zos: fix non-Release builds

z/OS doesn't support POSIX semaphores. On Release builds the code
paths that reference POSIX semaphore functions (e.g. sem_init())
are optimized away so linking succeeds but on a non-Release build
the references to the unavailable functions result in unresolved
symbol errors.

Stub the unavailable POSIX semaphore functions on z/OS as so the
code can link on non-Release builds.

PR-URL: https://github.com/libuv/libuv/pull/2737
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

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zos: explicitly mark message queue events

The os390 epoll_wait implementation uses poll() to detect events in
both file descriptors and the message queue used for file system
events.

zos: explicitly mark message queue events

The os390 epoll_wait implementation uses poll() to detect events in
both file descriptors and the message queue used for file system
events. The only message queue ID is always placed at the end of the
array passed to the poll() call. When the poll() call returns all FDs
and the message queue are checked for events by iterating through that
array. In order to distinguish the message queue from the FDs its ID
value is compared with the only message queue ID we have and if it
matches the message queue handler function is called.

When the message queue ID is relatively small, it may have the same
value as the value of one of the file descriptors. If this happens,
the message queue handler is called for the matching file descriptor,
and this call fails. The file descriptor ends up being unhandled and
this makes the next poll() call to return immediately. Eventually this
will happen again and again, leading to an infinite busy loop and high
CPU usage.

To prevent the incorrect interpretation of file descriptors as the
message queue, a new field has been added to the epoll event struct.
This field is checked instead of the ID value and the message queue
handler function is never called for file descriptors.

PR-URL: https://github.com/libuv/libuv/pull/2013
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

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linux: remove epoll syscall wrappers

Remove the syscalls wrappers now that the minimum requirements are
kernel 2.6.32 + glibc 2.12.

This commit should fix the epoll_pwait()-rela

linux: remove epoll syscall wrappers

Remove the syscalls wrappers now that the minimum requirements are
kernel 2.6.32 + glibc 2.12.

This commit should fix the epoll_pwait()-related issues that have
been reported against mips/mipsel builds.

Fixes: https://github.com/libuv/libuv/issues/335
PR-URL: https://github.com/libuv/libuv/pull/1372
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>

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zos: implement uv_fs_event* functions

This commit uses the Register File Interest feature on z/OS
to enable users to monitor file system events.
The poll call is used to check for fi

zos: implement uv_fs_event* functions

This commit uses the Register File Interest feature on z/OS
to enable users to monitor file system events.
The poll call is used to check for file descriptors as well
as a message queue that z/OS will report file system events
on. The last item on the list used by poll will contain the
message queue id instead of a file descriptor.

Limitation:
Writes to a directory (that is, file creation and deletion)
do not generate a change message for a registered directory.

PR-URL: https://github.com/libuv/libuv/pull/1311
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

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zos: add strnlen() implementation

Add an implementation of strnlen() which is not provided by default.

PR-URL: https://github.com/libuv/libuv/pull/1631
Reviewed-By: Ben Noordhui

zos: add strnlen() implementation

Add an implementation of strnlen() which is not provided by default.

PR-URL: https://github.com/libuv/libuv/pull/1631
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

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zos: fix readlink for mounts with system variables

On z/OS, fs mounts can have variables starting with '$'. The problem is
that following symlinks that contain these variables can lead t

zos: fix readlink for mounts with system variables

On z/OS, fs mounts can have variables starting with '$'. The problem is
that following symlinks that contain these variables can lead to a loop
because readlink($SYSVAR) will return $SYSVAR. To work around this, we
must resolve the $SYSVAR to an actual path using realpath.

More information about z/OS symlink resolution is available here:

https://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/
com.ibm.zos.v2r1.bpxb100/sym.htm

PR-URL: https://github.com/libuv/libuv/pull/1472
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

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zos: make platform functional

Fix all functional test cases:

* use PLO compare,swap,store for atomic instruction
* do not use semaphore.h
* use xplink flag when linking

zos: make platform functional

Fix all functional test cases:

* use PLO compare,swap,store for atomic instruction
* do not use semaphore.h
* use xplink flag when linking
* scandir implementation
* nanosleep implementation
* add proctitle
* uv_loadavg
* uv_fs_event_init/start
* uv_fs_event_stop
* uv_exepath using __getthent syscall
* read free/total memory from mvs data areas
* uv_resident_set_memory implementation
* network interfaces implementation
* cpu_info implementation
* implement uv__hrtime
* make uv__fs_mkdtemp implementation
* epoll implementation for asyncio
* uv__fs_event_close implementation
* set process title
* read ancillary data that remains on queue
* ancillary data
* implement uv__fs_access
* use /dev/urandom for temporary directory name
* disable proctitle on zos completely

PR-URL: https://github.com/libuv/libuv/pull/1037
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>

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