src/lib/dso/cpp/BUILD.bazel

# Copyright 2026 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Support libraries for C++ DSO components. See //src/sys/runners/dso/README.md
# for more information.
#
# DSO runner supports two kinds of components: "sync" and "async". Sync
# components receive a dedicated thread -- their dso_main() is very similar to
# standard main(). Async components may share a thread and run on a Fuchsia
# Driver Framework dispatcher (`fdf_dispatcher_t*`). DSO components that are
# written in C++ should depend on the corresponding library depending on if they
# are sync or async. Most users should use the convenience "fuchsia_cc_dso"
# wrapper in `fuchsia_dso.gni` to do this for them.

load("//build/bazel/rules/cc:fx_cc_library.bzl", "fx_cc_library")

package(default_applicable_licenses = ["//:license"])

fx_cc_library(
    name = "sync",
    srcs = ["sync.cc"],
    hdrs = ["sync.h"],
    implementation_deps = [
        # On Fuchsia, //zircon/system/public would shadow the sysroot's
        # <zircon/syscalls.h> without the generated syscalls/gen/*.inc files.
        "//src/zircon/lib/zircon:headers",  # @bazel2gn:path_overwrite://zircon/system/public
    ],
    target_compatible_with = ["@platforms//os:fuchsia"],
    # fuchsia_cc_dso() in //src/lib/dso/fuchsia_dso.gni expands in callers' GN packages.
    visibility = [
        "//examples/components/dso:__pkg__",
        "//src/lib/dso:__pkg__",
        "//src/sys/runners/dso:__subpackages__",
        "//src/ui/bin/scene_manager:__pkg__",
        "//src/ui/scenic/bin:__pkg__",
    ],
    alwayslink = True,
)

# TODO(https://fxbug.dev/503359085): Migrate to Bazel once
# //src/devices/bin/driver_runtime is available in Bazel.
fx_cc_library(
    name = "async",
    srcs = ["async.cc"],
    hdrs = ["async.h"],
    implementation_deps = [
        "//src/devices/lib/driver:driver_runtime",  # @bazel2gn:path_overwrite://src/devices/bin/driver_runtime
    ],
    target_compatible_with = ["@platforms//os:fuchsia"],
    # fuchsia_cc_dso() in //src/lib/dso/fuchsia_dso.gni expands in callers' GN packages.
    visibility = [
        "//examples/components/dso:__pkg__",
        "//src/lib/dso:__pkg__",
        "//src/sys/runners/dso:__subpackages__",
        "//src/ui/scenic/bin:__pkg__",
    ],
    deps = [
        "//sdk/lib/driver/runtime:driver_runtime",
        # On Fuchsia, //zircon/system/public would shadow the sysroot's
        # <zircon/syscalls.h> without the generated syscalls/gen/*.inc files.
        "//src/zircon/lib/zircon:headers",  # @bazel2gn:path_overwrite://zircon/system/public
    ],
    alwayslink = True,
)