# 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.

load(
    "@pigweed//pw_build:pigweed.bzl",
    "pw_cc_library",
)

package(default_visibility = ["//visibility:public"])

licenses(["notice"])

pw_cc_library(
    name = "config_assert",
    hdrs = [
        "public/pw_third_party/freertos/config_assert.h",
    ],
    includes = ["public"],
    deps = [
        "@pigweed//pw_assert",
    ],
)

constraint_setting(
    name = "port",
)

constraint_value(
    name = "port_ARM_CM7",
    constraint_setting = ":port",
)

constraint_value(
    name = "port_ARM_CM4F",
    constraint_setting = ":port",
)

pw_cc_library(
    name = "freertos",
    srcs = [
        "croutine.c",
        "event_groups.c",
        "list.c",
        "queue.c",
        "stream_buffer.c",
        "timers.c",
    ] + select({
        ":port_ARM_CM4F": ["portable/GCC/ARM_CM4F/port.c"],
        ":port_ARM_CM7": ["portable/GCC/ARM_CM7/r0p1/port.c"],
        "//conditions:default": [],
    }),
    includes = ["include/"] + select({
        ":port_ARM_CM4F": ["portable/GCC/ARM_CM4F"],
        ":port_ARM_CM7": ["portable/GCC/ARM_CM7/r0p1"],
        "//conditions:default": [],
    }),
    textual_hdrs = [
        "include/FreeRTOS.h",
        "include/StackMacros.h",
        "include/croutine.h",
        "include/deprecated_definitions.h",
        "include/event_groups.h",
        "include/list.h",
        "include/message_buffer.h",
        "include/mpu_wrappers.h",
        "include/portable.h",
        "include/projdefs.h",
        "include/queue.h",
        "include/semphr.h",
        "include/stack_macros.h",
        "include/stream_buffer.h",
        "include/task.h",
        "include/timers.h",
    ] + select({
        ":port_ARM_CM4F": ["portable/GCC/ARM_CM4F/portmacro.h"],
        ":port_ARM_CM7": ["portable/GCC/ARM_CM7/r0p1/portmacro.h"],
        "//conditions:default": [],
    }),
    deps = [
        ":pigweed_tasks_c",
        "@pigweed_config//:freertos_config",
    ],
    # Required because breaking out tasks_c results in the dependencies between
    # the libraries not being quite correct: to link pigweed_tasks_c you
    # actually need a bunch of the source files from here (e.g., list.c).
    alwayslink = 1,
)

# Constraint setting used to determine if task statics should be disabled.
constraint_setting(
    name = "disable_tasks_statics_setting",
    default_constraint_value = ":no_disable_task_statics",
)

constraint_value(
    name = "disable_task_statics",
    constraint_setting = ":disable_tasks_statics_setting",
)

constraint_value(
    name = "no_disable_task_statics",
    constraint_setting = ":disable_tasks_statics_setting",
)

pw_cc_library(
    name = "pigweed_tasks_c",
    srcs = ["tasks.c"],
    defines = select({
        ":disable_task_statics": [
            "PW_THIRD_PARTY_FREERTOS_NO_STATICS=1",
        ],
        "//conditions:default": [],
    }),
    includes = [
        "include/",
    ] + select({
        ":port_ARM_CM4F": ["portable/GCC/ARM_CM4F/"],
        ":port_ARM_CM7": ["portable/GCC/ARM_CM7/r0p1/"],
        "//conditions:default": [],
    }),
    local_defines = select({
        ":disable_task_statics": [
            "static=",
        ],
        "//conditions:default": [],
    }),
    # tasks.c transitively includes all these headers :/
    textual_hdrs = [
        "include/FreeRTOS.h",
        "include/portable.h",
        "include/projdefs.h",
        "include/list.h",
        "include/deprecated_definitions.h",
        "include/mpu_wrappers.h",
        "include/stack_macros.h",
        "include/task.h",
        "include/timers.h",
    ] + select({
        ":port_ARM_CM4F": ["portable/GCC/ARM_CM4F/portmacro.h"],
        ":port_ARM_CM7": ["portable/GCC/ARM_CM7/r0p1/portmacro.h"],
        "//conditions:default": [],
    }),
    deps = ["@pigweed_config//:freertos_config"],
)

# Constraint setting used to select the FreeRTOSConfig version.
constraint_setting(
    name = "freertos_config_setting",
)

alias(
    name = "freertos_config",
    actual = select({
        "@pigweed//targets/stm32f429i_disc1_stm32cube:freertos_config_cv": "@pigweed//targets/stm32f429i_disc1_stm32cube:freertos_config",
        "//conditions:default": "default_freertos_config",
    }),
)

pw_cc_library(
    name = "default_freertos_config",
    # The "default" config is not compatible with any configuration: you can't
    # build FreeRTOS without choosing a config.
    target_compatible_with = ["@platforms//:incompatible"],
)

# Exported for
# pw_thread_freertos/py/pw_thread_freertos/generate_freertos_tsktcb.py
exports_files(
    ["tasks.c"],
)