Internal.hpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2013  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #ifndef CYCRIPT_INTERNAL_HPP
  23 #define CYCRIPT_INTERNAL_HPP
  24
  25 #include <sig/parse.hpp>
  26 #include <sig/ffi_type.hpp>
  27
  28 #include <JavaScriptCore/JSBase.h>
  29 #include <JavaScriptCore/JSContextRef.h>
  30 #include <JavaScriptCore/JSObjectRef.h>
  31 #include <JavaScriptCore/JSValueRef.h>
  32
  33 #include "Pooling.hpp"
  34
  35 JSGlobalContextRef CYGetJSContext(JSContextRef context);
  36 void Structor_(CYPool &pool, sig::Type *&type);
  37
  38 JSObjectRef CYMakeType(JSContextRef context, const char *type);
  39 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type);
  40
  41 extern JSClassRef Functor_;
  42
  43 struct Type_privateData :
  44     CYData
  45 {
  46     static JSClassRef Class_;
  47
  48     ffi_type *ffi_;
  49     sig::Type *type_;
  50
  51     void Set(sig::Type *type) {
  52         type_ = new(*pool_) sig::Type;
  53         sig::Copy(*pool_, *type_, *type);
  54     }
  55
  56     Type_privateData(CYPool &pool, const char *type) :
  57         CYData(pool),
  58         ffi_(NULL)
  59     {
  60         sig::Signature signature;
  61         sig::Parse(*pool_, &signature, type, &Structor_);
  62         type_ = signature.elements[0].type;
  63     }
  64
  65     Type_privateData(const char *type) :
  66         ffi_(NULL)
  67     {
  68         sig::Signature signature;
  69         sig::Parse(*pool_, &signature, type, &Structor_);
  70         type_ = signature.elements[0].type;
  71     }
  72
  73     Type_privateData(sig::Type *type) :
  74         ffi_(NULL)
  75     {
  76         if (type != NULL)
  77             Set(type);
  78     }
  79
  80     Type_privateData(sig::Type *type, ffi_type *ffi) {
  81         ffi_ = new(*pool_) ffi_type;
  82         sig::Copy(*pool_, *ffi_, *ffi);
  83         Set(type);
  84     }
  85
  86     ffi_type *GetFFI() {
  87         if (ffi_ == NULL) {
  88             sig::Element element;
  89             element.name = NULL;
  90             element.type = type_;
  91             element.offset = 0;
  92
  93             sig::Signature signature;
  94             signature.elements = &element;
  95             signature.count = 1;
  96
  97             ffi_cif cif;
  98             sig::sig_ffi_cif(*pool_, &sig::ObjectiveC, &signature, &cif);
  99
 100             ffi_ = new(*pool_) ffi_type;
 101             *ffi_ = *cif.rtype;
 102         }
 103
 104         return ffi_;
 105     }
 106 };
 107
 108 struct CYValue :
 109     CYData
 110 {
 111     void *value_;
 112
 113     CYValue() {
 114     }
 115
 116     CYValue(const void *value) :
 117         value_(const_cast<void *>(value))
 118     {
 119     }
 120
 121     CYValue(const CYValue &rhs) :
 122         value_(rhs.value_)
 123     {
 124     }
 125
 126     virtual Type_privateData *GetType() const {
 127         return NULL;
 128     }
 129 };
 130
 131 struct CYOwned :
 132     CYValue
 133 {
 134   private:
 135     JSGlobalContextRef context_;
 136     JSObjectRef owner_;
 137
 138   public:
 139     CYOwned(void *value, JSContextRef context, JSObjectRef owner) :
 140         CYValue(value),
 141         context_(CYGetJSContext(context)),
 142         owner_(owner)
 143     {
 144         //XXX:JSGlobalContextRetain(context_);
 145         if (owner_ != NULL)
 146             JSValueProtect(context_, owner_);
 147     }
 148
 149     virtual ~CYOwned() {
 150         if (owner_ != NULL)
 151             JSValueUnprotect(context_, owner_);
 152         //XXX:JSGlobalContextRelease(context_);
 153     }
 154
 155     JSObjectRef GetOwner() const {
 156         return owner_;
 157     }
 158 };
 159
 160 namespace cy {
 161 struct Functor :
 162     CYValue
 163 {
 164   private:
 165     void set() {
 166         sig::sig_ffi_cif(*pool_, &sig::ObjectiveC, &signature_, &cif_);
 167     }
 168
 169   public:
 170     sig::Signature signature_;
 171     ffi_cif cif_;
 172
 173     Functor(const sig::Signature &signature, void (*value)()) :
 174         CYValue(reinterpret_cast<void *>(value))
 175     {
 176         sig::Copy(*pool_, signature_, signature);
 177         set();
 178     }
 179
 180     Functor(const char *encoding, void (*value)()) :
 181         CYValue(reinterpret_cast<void *>(value))
 182     {
 183         sig::Parse(*pool_, &signature_, encoding, &Structor_);
 184         set();
 185     }
 186
 187     void (*GetValue() const)() {
 188         return reinterpret_cast<void (*)()>(value_);
 189     }
 190
 191     static JSStaticFunction const * const StaticFunctions;
 192 }; }
 193
 194 struct Closure_privateData :
 195     cy::Functor
 196 {
 197     JSGlobalContextRef context_;
 198     JSObjectRef function_;
 199
 200     Closure_privateData(JSContextRef context, JSObjectRef function, const sig::Signature &signature) :
 201         cy::Functor(signature, NULL),
 202         context_(CYGetJSContext(context)),
 203         function_(function)
 204     {
 205         //XXX:JSGlobalContextRetain(context_);
 206         JSValueProtect(context_, function_);
 207     }
 208
 209     virtual ~Closure_privateData() {
 210         JSValueUnprotect(context_, function_);
 211         //XXX:JSGlobalContextRelease(context_);
 212     }
 213 };
 214
 215 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const sig::Signature &signature, void (*callback)(ffi_cif *, void *, void **, void *));
 216 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef));
 217
 218 #endif/*CYCRIPT_INTERNAL_HPP*/