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use std::panic;
use webcore::ffi;
/// Initializes the library.
///
/// Necessary **only** when compiling **without** `cargo-web`.
#[inline(never)]
#[cold]
pub fn initialize() {
static mut INITIALIZED: bool = false;
unsafe {
if INITIALIZED {
return;
}
INITIALIZED = true;
}
#[cfg(not(feature = "docs-rs"))]
include!( concat!( env!( "OUT_DIR" ), env!( "PATH_SEPARATOR" ), "runtime.rs" ) );
if cfg!( test ) == false {
panic::set_hook( Box::new( |info| {
__js_raw_asm!( "console.error( 'Encountered a panic!' );" );
if let Some( value ) = info.payload().downcast_ref::< String >() {
__js_raw_asm!( "\
console.error( 'Panic error message:', Module.STDWEB_PRIVATE.to_js_string( $0, $1 ) );\
", value.as_ptr(), value.len() );
}
if let Some( location ) = info.location() {
let file = location.file();
__js_raw_asm!( "\
console.error( 'Panic location:', Module.STDWEB_PRIVATE.to_js_string( $0, $1 ) + ':' + $2 );\
", file.as_ptr(), file.len(), location.line() );
}
}));
}
}
/// Runs Emscripten's event loop.
///
/// If you're compiling your project **without** using `cargo-web`
/// **and** you're using an Emscripten-based target (`asmjs-unknown-emscripten`,
/// or `wasm32-unknown-emscripten`) then calling this before returning
/// from `main()` is **mandatory** and will **not** return. (It is, effectively, an infinite loop.)
///
/// If you're using `cargo-web` to build your project then you never need to call this.
pub fn event_loop() {
ffi::event_loop();
}