Files
puzzles/cmake/platforms/emscripten.cmake
Ian Jackson 77866e1335 wasm/js/emscripten: Fix page loading race
Using a stunt webserver which artificially introduces a 3s delay just
before the last line of the HTML output, I have reproduced a
uwer-reported loading/startup race bug:

Previously the wasm loading was started by the <script> element,
synchronously. If the wasm loading is fast, and finishes before the
HTML loading, the onRuntimeInitialized event may occur before
initPuzzles.  But initPuzzles sets up the event handler.

Fix this bug, and introduce a new comment containing an argument for
the correctness of the new approach.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
2021-04-22 21:22:48 +01:00

51 lines
1.4 KiB
CMake

set(platform_common_sources emcc.c)
set(platform_gui_libs)
set(platform_libs)
set(CMAKE_EXECUTABLE_SUFFIX ".js")
set(emcc_export_list
# Event handlers for mouse and keyboard input
_mouseup
_mousedown
_mousemove
_key
# Callback when the program activates timing
_timer_callback
# Callback from button presses in the UI outside the canvas
_command
# Game-saving and game-loading functions
_get_save_file
_free_save_file
_load_game
# Callbacks to return values from dialog boxes
_dlg_return_sval
_dlg_return_ival
# Callbacks when the resizing controls are used
_resize_puzzle
_restore_puzzle_size
# Main program, run at initialisation time
_main)
list(TRANSFORM emcc_export_list PREPEND \")
list(TRANSFORM emcc_export_list APPEND \")
string(JOIN "," emcc_export_string ${emcc_export_list})
set(CMAKE_C_LINK_FLAGS "\
-s ALLOW_MEMORY_GROWTH=1 \
-s EXPORTED_FUNCTIONS='[${emcc_export_string}]' \
-s EXTRA_EXPORTED_RUNTIME_METHODS='[cwrap,callMain]'")
set(build_cli_programs FALSE)
function(get_platform_puzzle_extra_source_files OUTVAR NAME)
set(${OUTVAR} PARENT_SCOPE)
endfunction()
function(set_platform_puzzle_target_properties NAME TARGET)
em_link_pre_js(${TARGET} ${CMAKE_SOURCE_DIR}/emccpre.js)
em_link_js_library(${TARGET} ${CMAKE_SOURCE_DIR}/emcclib.js)
em_link_post_js(${TARGET} ${CMAKE_SOURCE_DIR}/emccpost.js)
endfunction()
function(build_platform_extras)
endfunction()