mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-16 00:00:07 +01:00
31dfc4aa12
This adds support for the integrating libdbus into the lws event loop. Unlike the other roles, lws doesn't completely adopt the fd and libdbus insists to retain control over the fd lifecycle. However libdbus provides apis for foreign code (lws) to provide event loop services to libdbus for the fd. Accordingly, unlike the other roles rx and writeable are not subsumed into lws callback messages and the events remain the property of libdbus. A context struct wrapper is provided that is available in the libdbus callbacks to bridge between the lws and dbus worlds, along with a minimal example dbus client and server.
120 lines
3.4 KiB
CMake
120 lines
3.4 KiB
CMake
cmake_minimum_required(VERSION 2.8)
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include(CheckCSourceCompiles)
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include(CheckLibraryExists)
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set(SAMP lws-minimal-dbus-client)
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set(SRCS minimal-dbus-client.c)
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if (NOT LWS_WITH_MINIMAL_EXAMPLES)
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CHECK_LIBRARY_EXISTS(dbus-1 dbus_connection_set_watch_functions "" LWS_HAVE_LIBDBUS)
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if (NOT LWS_HAVE_LIBDBUS)
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message(FATAL_ERROR "Install dbus-devel, or libdbus-1-dev etc")
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endif()
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if (NOT LWS_DBUS_LIB)
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set(LWS_DBUS_LIB "dbus-1")
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endif()
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if (NOT LWS_DBUS_INCLUDE1)
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# look in fedora and debian / ubuntu place
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if (EXISTS "/usr/include/dbus-1.0")
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set(LWS_DBUS_INCLUDE1 "/usr/include/dbus-1.0")
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else()
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message(FATAL_ERROR "Set LWS_DBUS_INCLUDE1 to /usr/include/dbus-1.0 or wherever the main dbus includes are")
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endif()
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endif()
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if (NOT LWS_DBUS_INCLUDE2)
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# look in fedora... debian / ubuntu has the ARCH in the path...
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if (EXISTS "/usr/lib64/dbus-1.0/include")
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set(LWS_DBUS_INCLUDE2 "/usr/lib64/dbus-1.0/include")
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else()
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message(FATAL_ERROR "Set LWS_DBUS_INCLUDE2 to /usr/lib/ARCH-linux-gnu/dbus-1.0/include or wherever dbus-arch-deps.h is on your system")
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endif()
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endif()
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set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES};${LWS_DBUS_INCLUDE1};${LWS_DBUS_INCLUDE2})
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if (NOT LWS_DBUS_INCLUDE1 OR NOT LWS_DBUS_INCLUDE2)
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message(FATAL_ERROR "To build with libdbus, LWS_DBUS_INCLUDE1/2 must be given. See lib/roles/dbus/README.md")
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endif()
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endif()
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# If we are being built as part of lws, confirm current build config supports
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# reqconfig, else skip building ourselves.
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#
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# If we are being built externally, confirm installed lws was configured to
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# support reqconfig, else error out with a helpful message about the problem.
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#
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MACRO(require_lws_config reqconfig _val result)
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if (DEFINED ${reqconfig})
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if (${reqconfig})
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set (rq 1)
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else()
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set (rq 0)
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endif()
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else()
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set(rq 0)
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endif()
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if (${_val} EQUAL ${rq})
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set(SAME 1)
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else()
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set(SAME 0)
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endif()
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if (LWS_WITH_MINIMAL_EXAMPLES AND NOT ${SAME})
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if (${_val})
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message("${SAMP}: skipping as lws being built without ${reqconfig}")
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else()
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message("${SAMP}: skipping as lws built with ${reqconfig}")
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endif()
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set(${result} 0)
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else()
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if (LWS_WITH_MINIMAL_EXAMPLES)
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set(MET ${SAME})
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else()
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CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\n#if defined(${reqconfig})\n return 0;\n#else\n fail;\n#endif\n return 0;\n}\n" HAS_${reqconfig})
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if (NOT DEFINED HAS_${reqconfig} OR NOT HAS_${reqconfig})
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set(HAS_${reqconfig} 0)
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else()
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set(HAS_${reqconfig} 1)
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endif()
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if ((HAS_${reqconfig} AND ${_val}) OR (NOT HAS_${reqconfig} AND NOT ${_val}))
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set(MET 1)
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else()
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set(MET 0)
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endif()
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endif()
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if (NOT MET)
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if (${_val})
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message(FATAL_ERROR "This project requires lws must have been configured with ${reqconfig}")
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else()
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message(FATAL_ERROR "Lws configuration of ${reqconfig} is incompatible with this project")
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endif()
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endif()
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endif()
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ENDMACRO()
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set(requirements 1)
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require_lws_config(LWS_ROLE_DBUS 1 requirements)
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require_lws_config(LWS_WITHOUT_CLIENT 0 requirements)
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if (requirements)
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add_executable(${SAMP} ${SRCS})
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include_directories("${LWS_DBUS_INCLUDE1}")
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include_directories("${LWS_DBUS_INCLUDE2}")
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list(APPEND LIB_LIST dbus-1)
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if (websockets_shared)
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target_link_libraries(${SAMP} websockets_shared)
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add_dependencies(${SAMP} websockets_shared ${LWS_DBUS_LIB})
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else()
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target_link_libraries(${SAMP} websockets ${LWS_DBUS_LIB})
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endif()
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endif()
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