async: remove tag_invoke calls

P2300R9 removed usage of tag_invoke. stdexec still has it
but in order to be forward compliant with the C++26 standard
we should modernize the code and remove its usa

async: remove tag_invoke calls

P2300R9 removed usage of tag_invoke. stdexec still has it
but in order to be forward compliant with the C++26 standard
we should modernize the code and remove its usage. This also
has the benefit of simplifying most sender/receiver implementations.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ib0a1d0a82485c8d247a18daa020d0bba2249e95c

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add support for async mutex

Add support for async mutex for synchronizing coroutines/tasks using
sender receiver framework. Also, add lock_guard support which provides a
RAII wrapper for mutex to ow

add support for async mutex

Add support for async mutex for synchronizing coroutines/tasks using
sender receiver framework. Also, add lock_guard support which provides a
RAII wrapper for mutex to own it for the duration of a scoped block.

Tested: Add Unit Test using gtest
```
1/1 test_async_mutex OK 2.01s

Ok: 1
Expected Fail: 0
Fail: 0
Unexpected Pass: 0
Skipped: 0
Timeout: 0
```

Change-Id: I691528885a94b9cf55d4b7f2fb0c1e0e6d0ab84f
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

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add support for timed fdio

For certain operations such as reading and writing to a fd for request
response flows, the fd needs to have a timeout to avoid everlasting
hangs in case of a unresponsive

add support for timed fdio

For certain operations such as reading and writing to a fd for request
response flows, the fd needs to have a timeout to avoid everlasting
hangs in case of a unresponsive responder. To support this, the fdio has
been extended to add timeout support by throwing an exception in case of
timeout.

Tested: Unit Test
```
1/1 test_async_fdio_timed OK 10.03s

Ok: 1
Expected Fail: 0
Fail: 0
Unexpected Pass: 0
Skipped: 0
Timeout: 0
```

Change-Id: Ib219e4a4c55125785e6c1571488e445ba3379244
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>

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watchdog: add support for systemd watchdog

Add interfaces and handling for systemd watchdog petting.

Systemd service files can specify a watchdog timeout and systemd will
expect the application to

watchdog: add support for systemd watchdog

Add interfaces and handling for systemd watchdog petting.

Systemd service files can specify a watchdog timeout and systemd will
expect the application to periodically poke a software watchdog, or
else the service will be restarted. This is enabled with the
'WatchdogSec=' service file directive. Add primitives for
interacting with the watchdog APIs.

Enable automatic support in the `async::context` for this watchdog
handling, such that if the watchdog is required (by checking
sd_watchdog_enabled) the daemon will automatically pet at the
appropriate rate, assuming that the `async::context` is functioning
correctly.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I68caf7b2c7166ca402b07ecee3db65f75365aa72

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clang-format: re-format for clang-19

clang-format-19 isn't compatible with the clang-format-18 output, so we
need to reformat the code with the latest version. A few parameters
in clang-tidy have b

clang-format: re-format for clang-19

clang-format-19 isn't compatible with the clang-format-18 output, so we
need to reformat the code with the latest version. A few parameters
in clang-tidy have been deprecated, so adjust the style file
accordingly.

See Ie2f6eb3b043f2d655c9df806815afd7971fd0947 for updated style.
See I88192b41ab7a95599a90915013579608af7bc56f for clang-19 enablement.

Change-Id: I65cb0501917fee37f007ed97ce973e0dd07170fa
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

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stdexec: update to latest commit

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I93e33afb0ca87f425074e86f87e6cde320f20dbc

async: fdio: remove unused member

clang warns about an unused private field ('fd') because it is
a capture-only member. There isn't any reason to keep the fd
around once the underlying sd_event has

async: fdio: remove unused member

clang warns about an unused private field ('fd') because it is
a capture-only member. There isn't any reason to keep the fd
around once the underlying sd_event has been created, so remove
it as a member.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I176b2c4b53bbd7e4bb4bc9a9594f5816ee1bda2e

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add async fd sender receiver for coroutines

Add async sender receiver for file descriptor based events. The user of
the async file descriptor needs to initialize a fdio instance and then
call next()

add async fd sender receiver for coroutines

Add async sender receiver for file descriptor based events. The user of
the async file descriptor needs to initialize a fdio instance and then
call next() to get each new event for the fd.

Tested:
```
> meson test -C builddir test_async_fdio
ninja: Entering directory `/host/repos/sdbusplus/builddir'
ninja: no work to do.
1/1 test_async_fdio OK 6.01s

Ok: 1
Expected Fail: 0
Fail: 0
Unexpected Pass: 0
Skipped: 0
Timeout: 0

Full log written to /host/repos/sdbusplus/builddir/meson-logs/testlog.txt
```

Change-Id: I1b4f16963e6096f30484c4a6df471e64ed24448b
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>

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clang-format: re-format for clang-18

clang-format-18 isn't compatible with the clang-format-17 output, so we
need to reformat the code with the latest version. The way clang-18
handles lambda forma

clang-format: re-format for clang-18

clang-format-18 isn't compatible with the clang-format-17 output, so we
need to reformat the code with the latest version. The way clang-18
handles lambda formatting also changed, so we have made changes to the
organization default style format to better handle lambda formatting.

See I5e08687e696dd240402a2780158664b7113def0e for updated style.
See Iea0776aaa7edd483fa395e23de25ebf5a6288f71 for clang-18 enablement.

Change-Id: I4f63258febea27dae710c252033b9151e02be7e8
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

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async: context: use transfer instead of schedule

Later revisions of the stdexec proposal added a `transfer` method
that allows us to reduce 1 co_await.

Signed-off-by: Patrick Williams <patrick@stwc

async: context: use transfer instead of schedule

Later revisions of the stdexec proposal added a `transfer` method
that allows us to reduce 1 co_await.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: If43877a85254b5572cc2a3a1cacdf6b580870b5a

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async: context: clean up TODO

The latest version of stdexec cleans up an issue we were seeing
that was marked with a TODO. Switch from a complicated task
structure back to the simple `task<>`.

Sig

async: context: clean up TODO

The latest version of stdexec cleans up an issue we were seeing
that was marked with a TODO. Switch from a complicated task
structure back to the simple `task<>`.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ibe2a73b1e7d172f829308a12c88749db43354e83

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clang-format: copy latest and re-format

clang-format-17 has some backwards incompatible changes that require
additional settings for best compatibility and re-running the formatter.
Copy the latest

clang-format: copy latest and re-format

clang-format-17 has some backwards incompatible changes that require
additional settings for best compatibility and re-running the formatter.
Copy the latest .clang-format from the docs repository and reformat the
repository.

Change-Id: I1d7d35c8035993df4c164bfb055d3be476d3ea84
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

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async: context: add implicit conversion to bus_t

Many existing sdbusplus library calls expect a `bus_t`. Add an
implicit conversion to `bus_t&` so that a `context_t&` can be passed
into any functio

async: context: add implicit conversion to bus_t

Many existing sdbusplus library calls expect a `bus_t`. Add an
implicit conversion to `bus_t&` so that a `context_t&` can be passed
into any function that formerly accepted a `bus_t&`.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I791bf88d86ba5761a4d2fa9bf811b6e794b097af

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async: add context_ref class for CRTP patterns

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I6364f6f5a654ec0c628112637014ae2daed5d740

bus: Consistently leverage mock

We have some project generating matches that are using the mock.
Previously, we never checked the return value of this function and it
allowed our match creations to

bus: Consistently leverage mock

We have some project generating matches that are using the mock.
Previously, we never checked the return value of this function and it
allowed our match creations to silently fail. With error checking added,
this was breaking unit tests.

This change makes sure that all users of slot generating functions have
their calls properly mocked.

Change-Id: I5dab3e3ae73e8516db21c928fc39bc00d4218c82
Signed-off-by: William A. Kennington III <wak@google.com>

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async: add is_sender type-aliases

The latest version of stdexec requires all sender types to include a
type alias `is_sender` (which their examples all set to `void`) or
else a unique overload of a

async: add is_sender type-aliases

The latest version of stdexec requires all sender types to include a
type alias `is_sender` (which their examples all set to `void`) or
else a unique overload of a stdexec template. Add the type alias to
all of our defined sender types.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I2229905703b0f9c360d0fa5f1ba6acffd1f22a02

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async: context: remove pending_exception handling

With the move from scope to exec::async_scope there is no possibility
for pending-exceptions so clean up all the associated code.

Signed-off-by: Pa

async: context: remove pending_exception handling

With the move from scope to exec::async_scope there is no possibility
for pending-exceptions so clean up all the associated code.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I6f110d0641b9ba566e480f8e43eb90976e2b3c93

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async: switch to stdexec async_scope

Use the `async_scope` implementation from stdexec instead of the
custom `scope` class here, which greatly reduces our own code and
also aligns better with the C+

async: switch to stdexec async_scope

Use the `async_scope` implementation from stdexec instead of the
custom `scope` class here, which greatly reduces our own code and
also aligns better with the C++ STL direction. The major changes are
around exception paths:

- Spawned tasks which end with an exception will now std::terminate,
so any task expected to throw should have an `upon_error` chain.

- Spawned tasks which are stopped will be no longer throw an
`UnexpectedStop` exception, so they should be chained with an
`upon_stopped` if this is important.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I4e0c85712652efa5b296b898dcc2b0026ba4c625

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clang-format: copy latest and re-format

clang-format-16 has some backwards incompatible changes that require
additional settings for best compatibility and re-running the formatter.
Copy the latest

clang-format: copy latest and re-format

clang-format-16 has some backwards incompatible changes that require
additional settings for best compatibility and re-running the formatter.
Copy the latest .clang-format from the docs repository and reformat the
repository.

Change-Id: I5daa012bf76924eb7a7d22ed31b6b77ad2f723df
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

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async: change namespace for sync_wait

Upstream stdexec moved the sync_wait from the `stdexec::this_thread`
namespace directly into `stdexec`.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Cha

async: change namespace for sync_wait

Upstream stdexec moved the sync_wait from the `stdexec::this_thread`
namespace directly into `stdexec`.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I9a28b4c5920d0f9892ba466d919fd29f2397f64a

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stdexec: update to later commit

The upstream code has done some namespace changes. Point to a commit
in that timeframe and fix up the local usages in order to compile
successfully.

Signed-off-by:

stdexec: update to later commit

The upstream code has done some namespace changes. Point to a commit
in that timeframe and fix up the local usages in order to compile
successfully.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5a21ccd0774ee5cd22d45c9a425e43560734a571

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Remove extra semi-colons

A couple functions had extra semi-colons, which clang -Weverything
flags. Remove them.

Change-Id: I2b44444c3184817dd0035c62b5ae114254457398
Signed-off-by: Ed Tanous <edtan

Remove extra semi-colons

A couple functions had extra semi-colons, which clang -Weverything
flags. Remove them.

Change-Id: I2b44444c3184817dd0035c62b5ae114254457398
Signed-off-by: Ed Tanous <edtanous@google.com>

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async: context: allow many exceptions

Allow many spawned tasks to throw exceptions and queue them up,
re-throwing them one-by-one from `context::run` calls. Similarly
enhance `context::scope` so th

async: context: allow many exceptions

Allow many spawned tasks to throw exceptions and queue them up,
re-throwing them one-by-one from `context::run` calls. Similarly
enhance `context::scope` so that many `context::empty` completions
can complete with error.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I8744e0a3b8b0663ebd5ca26db0f5943688afe62a

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async: context: allow run re-entrance

Switch the context call so that it can be re-entrant. A single call
to `run` will either:

1. Process until the context is successfully stopped.
2. An

async: context: allow run re-entrance

Switch the context call so that it can be re-entrant. A single call
to `run` will either:

1. Process until the context is successfully stopped.
2. An exception is raised from a spawned task.

If an exception is raised, it could be caught outside the run call
and then run called again.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Icd05df421a1f0592bd2390fbe8e21a16252eafed

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async: context: simplify run function

Since we already have a `spawn` function to add async tasks,
get rid of the special "startup" task send to run. Instead
users should pass the start up work to

async: context: simplify run function

Since we already have a `spawn` function to add async tasks,
get rid of the special "startup" task send to run. Instead
users should pass the start up work to spawn and call run with
no parameters.

Eventually this will allow us to exit the run-loop for any and all
exceptions from the async context and potentially allow a caller
to re-enter the `run` loop after handling the child exception.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ia0e09a2493f0554538315d1d0c238aa11cb44e39

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