source upload

contrib/mORMot/SyNode/Samples/01 - Dll Modules/math-module/package.json

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+{
+  "name": "math-module",
+  "version": "1.0.0",
+  "description": "Native (dll) module sample for SyNode",
+  "main": "./build/mathModule.dll",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [
+    "SyNode"
+  ],
+  "author": "pavel.mash <pavel.mash@gmail.com> (https://unitybase.info)",
+  "license": "MIT"
+}

contrib/mORMot/SyNode/Samples/01 - Dll Modules/math-module/src/mathModule.dpr

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+library MathModule;
+
+uses
+  FastMM4,
+  SysUtils,
+  Classes,
+  Windows,
+  SpiderMonkey,
+  SyNodePluginIntf,
+  uMathModule in 'uMathModule.pas';
+
+const
+  MAX_THREADS = 256;
+// just copy Empty plugin,
+// create unit with your plugin realization(descendant of the TCustomSMPlugin)
+// and override methods Init and UnInit is needed
+  PluginType: TCustomSMPluginType =  TSMMathPlugin;   //In real realization you must declare you own class child of TCustomSMPlugin and override methods Init and UnInit
+
+var
+  ThreadRecs: array[0..MAX_THREADS] of TThreadRec;
+  threadCounter: integer;
+
+function InitPlugin(cx: PJSContext; exports_: PJSRootedObject; require: PJSRootedObject; module: PJSRootedObject; __filename: PWideChar; __dirname: PWideChar): boolean; cdecl;
+var
+  l: integer;
+begin
+  l := InterlockedIncrement(threadCounter);
+  if l>=MAX_THREADS then
+    raise Exception.Create('Too many thread. Max is 256');
+  ThreadRecs[l].threadID := GetCurrentThreadId;
+  ThreadRecs[l].plugin := PluginType.Create(cx, exports_, require, module, __filename, __dirname);
+  result := true;
+end;
+
+function UnInitPlugin(): boolean; cdecl;
+var
+  i: integer;
+begin
+  for I := 0 to MAX_THREADS - 1 do
+    if ThreadRecs[i].threadID = GetCurrentThreadId then begin
+      ThreadRecs[i].threadID := 0;
+      FreeAndNil(ThreadRecs[i].plugin);
+    end;
+  result := true;
+end;
+
+exports InitPlugin;
+exports UnInitPlugin;
+
+begin
+  IsMultiThread := True; //!!IMPORTANT for FastMM
+  threadCounter := -1;
+  FillMemory(@ThreadRecs[0], SizeOf(ThreadRecs), 0);
+end.

contrib/mORMot/SyNode/Samples/01 - Dll Modules/math-module/src/uMathModule.pas

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+unit uMathModule;
+
+interface
+
+uses 
+  SyNodePluginIntf;
+
+type
+  TSMMathPlugin = class(TCustomSMPlugin)
+    procedure UnInit; override;
+    procedure Init(const rec: TSMPluginRec); override;
+  end;
+
+implementation
+
+uses
+  SpiderMonkey, SysUtils;
+
+{ TSMMathPlugin }
+
+type
+  TMathFun = function (const X, Y : Extended) : Extended;
+
+function DoMathFun(cx: PJSContext; argc: uintN; var vp: JSArgRec; fun: TMathFun): Boolean; cdecl;
+var
+  in_argv: PjsvalVector;
+  aVal1, aVal2, aRes: Double;
+  val: jsval;
+begin
+  try
+    in_argv := vp.argv;
+    if (argc<>2) then
+      raise ESMException.Create('invalid args count for math function. Required (Number, Number)')
+    else if not in_argv[0].isNumber or not in_argv[1].isNumber then
+      raise ESMException.CreateUTF8('invalid args for math function. Required (Number, Number) but got (%, %)', [integer(in_argv[0].ValType(cx)), integer(in_argv[1].ValType(cx))]);
+
+    if in_argv[0].isInteger then
+      aVal1 := in_argv[0].asInteger
+    else
+      aVal1 := in_argv[0].asDouble;
+    if in_argv[1].isInteger then
+      aVal2 := in_argv[1].asInteger
+    else
+      aVal2 := in_argv[1].asDouble;
+
+    aRes := fun(aVal1, aVal2);
+    val.asDouble := aRes;
+
+    vp.rval := val;
+    Result := True;
+  except
+    on E: Exception do begin
+      Result := False;
+      vp.rval := JSVAL_VOID;
+      JSError(cx, E);
+    end;
+  end;
+
+end;
+
+function DoAdd(const X, Y : Extended) : Extended;
+begin
+  result := X+Y;
+end;
+
+function DoSub(const X, Y : Extended) : Extended;
+begin
+  result := X-Y;
+end;
+
+function DoMul(const X, Y : Extended) : Extended;
+begin
+  result := X*Y;
+end;
+
+function DoDiv(const X, Y : Extended) : Extended;
+begin
+  if Y = 0 then
+    raise ESMException.Create('division by zero');
+  result := X/Y;
+end;
+
+function math_add(cx: PJSContext; argc: uintN; var vp: JSArgRec): Boolean; cdecl;
+begin
+  result := DoMathFun(cx, argc, vp, DoAdd);
+end;
+
+function math_sub(cx: PJSContext; argc: uintN; var vp: JSArgRec): Boolean; cdecl;
+begin
+  result := DoMathFun(cx, argc, vp, DoSub);
+end;
+
+function math_mul(cx: PJSContext; argc: uintN; var vp: JSArgRec): Boolean; cdecl;
+begin
+  result := DoMathFun(cx, argc, vp, DoMul);
+end;
+
+function math_div(cx: PJSContext; argc: uintN; var vp: JSArgRec): Boolean; cdecl;
+begin
+  result := DoMathFun(cx, argc, vp, DoDiv);
+end;
+
+procedure TSMMathPlugin.Init(const rec: TSMPluginRec);
+var val: jsval;
+begin
+  inherited;
+  // this method is called when SM Engine required this plugin
+  // here you can define exports (rec.Exp) properties
+  // or redefime module (rec.Module) property 'exports'
+  rec.Exp.ptr.DefineFunction(rec.cx, 'add', math_add, 2, StaticROAttrs);
+  rec.Exp.ptr.DefineFunction(rec.cx, 'sub', math_sub, 2, StaticROAttrs);
+  rec.Exp.ptr.DefineFunction(rec.cx, 'mul', math_mul, 2, StaticROAttrs);
+  rec.Exp.ptr.DefineFunction(rec.cx, 'div', math_div, 2, StaticROAttrs);
+  val.asDouble := pi;
+  rec.Exp.ptr.DefineProperty(rec.cx, 'pi', val, StaticROAttrs, nil, nil);
+end;
+
+procedure TSMMathPlugin.UnInit;
+begin
+  inherited;
+  // this method is called when SM Engine destroyed
+  // here you can finaliza your plugin if it is needed
+end;
+
+end.