# Copyright 2021 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

import("//build_overrides/pigweed.gni")

import("$dir_pw_build/target_types.gni")
import("$dir_pw_chrono/backend.gni")
import("$dir_pw_docgen/docs.gni")

config("public_include_path") {
  include_dirs = [ "public" ]
  visibility = [ ":*" ]
}

config("backend_config") {
  include_dirs = [ "public_overrides" ]
  visibility = [ ":*" ]
}

# This target provides the backend for pw::sync::InterruptSpinLock.
# The provided implementation makes a single attempt to acquire the lock and
# asserts if it is unavailable. It does not perform interrupt masking or disable
# global interrupts, so this implementation does not support simultaneous
# multi-threaded environments including IRQs, and is only meant to prevent
# data corruption.
pw_source_set("spin_lock") {
  public_deps = [ ":interrupt_spin_lock" ]
}
pw_source_set("interrupt_spin_lock") {
  public_configs = [
    ":public_include_path",
    ":backend_config",
  ]
  public = [
    "public/pw_sync_baremetal/interrupt_spin_lock_inline.h",
    "public/pw_sync_baremetal/interrupt_spin_lock_native.h",
    "public_overrides/pw_sync_backend/interrupt_spin_lock_inline.h",
    "public_overrides/pw_sync_backend/interrupt_spin_lock_native.h",
  ]
  public_deps = [
    "$dir_pw_assert",
    "$dir_pw_sync:interrupt_spin_lock.facade",
    "$dir_pw_sync:yield_core",
  ]
}

pw_doc_group("docs") {
  sources = [ "docs.rst" ]
}