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Merge wasm-session-api branch into trunk, adding the session API to the JS/WASM components.

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FossilOrigin-Name: dfb8b651fa4faef2d3307a05512cdc479398484c3a59715827179c363861a777
This commit is contained in:
stephan
2022-12-25 20:25:44 +00:00
parent 7a5544b958 9d61db1944
commit 3caf13f1cb
9 changed files with 412 additions and 40 deletions
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39
ext/wasm/common/whwasmutil.js
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@ -246,6 +246,25 @@ self.WhWasmUtilInstaller = function(target){
cache.utf8Decoder = new TextDecoder();
cache.utf8Encoder = new TextEncoder('utf-8');
/**
For the given IR-like string in the set ('i8', 'i16', 'i32',
'f32', 'float', 'i64', 'f64', 'double', '*'), or any string value
ending in '*', returns the sizeof for that value
(target.ptrSizeof in the latter case). For any other value, it
returns the undefined value.
*/
target.irSizeof = (n)=>{
switch(n){
case 'i8': return 1;
case 'i16': return 2;
case 'i32': case 'f32': case 'float': return 4;
case 'i64': case 'f64': case 'double': return 8;
case '*': return ptrSizeof;
default:
return (''+n).endsWith('*') ? ptrSizeof : undefined;
}
};
/**
If (cache.heapSize !== cache.memory.buffer.byteLength), i.e. if
the heap has grown since the last call, updates cache.HEAPxyz.
@ -447,7 +466,7 @@ self.WhWasmUtilInstaller = function(target){
type(s) of the given function signature, or throws if the
signature is invalid. */
/******** // only valid for use with the WebAssembly.Function ctor, which
// is not yet documented on MDN.
// is not yet documented on MDN.
sigToWasm: function(sig){
const rc = {parameters:[], results: []};
if('v'!==sig[0]) rc.results.push(f.sigTypes(sig[0]));
@ -1590,10 +1609,20 @@ self.WhWasmUtilInstaller = function(target){
not actually bind any functions. Its convertArg() method is
called via xWrap() to perform any bindings.
Shortcomings: function pointers which include C-string arguments
may still need a level of hand-written wrappers around them,
depending on how they're used, in order to provide the client
with JS strings.
Shortcomings:
- These "reverse" bindings, i.e. calling into a JS-defined
function from a WASM-defined function (the generated proxy
wrapper), lack all type conversion support. That means, for
example, that...
- Function pointers which include C-string arguments may still
need a level of hand-written wrappers around them, depending on
how they're used, in order to provide the client with JS
strings. Alternately, clients will need to perform such conversions
on their own, e.g. using cstrtojs(). Or maybe we can find a way
to perform such conversions here, via addition of an xWrap()-style
function signature to the options argument.
*/
xArg.FuncPtrAdapter = class FuncPtrAdapter extends AbstractArgAdapter {
constructor(opt) {