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         // XXX: just in case I messed up migrating
  77         _assert(type != NULL);
  78         Set(type);
  79     }
  80
  81     Type_privateData(sig::Type *type, ffi_type *ffi) {
  82         ffi_ = new(*pool_) ffi_type;
  83         sig::Copy(*pool_, *ffi_, *ffi);
  84         Set(type);
  85     }
  86
  87     ffi_type *GetFFI() {
  88         if (ffi_ == NULL) {
  89             sig::Element element;
  90             element.name = NULL;
  91             element.type = type_;
  92             element.offset = 0;
  93
  94             sig::Signature signature;
  95             signature.elements = &element;
  96             signature.count = 1;
  97
  98             ffi_cif cif;
  99             sig::sig_ffi_cif(*pool_, &sig::ObjectiveC, &signature, &cif);
 100
 101             ffi_ = new(*pool_) ffi_type;
 102             *ffi_ = *cif.rtype;
 103         }
 104
 105         return ffi_;
 106     }
 107 };
 108
 109 struct CYValue :
 110     CYData
 111 {
 112     void *value_;
 113
 114     CYValue() {
 115     }
 116
 117     CYValue(const void *value) :
 118         value_(const_cast<void *>(value))
 119     {
 120     }
 121
 122     CYValue(const CYValue &rhs) :
 123         value_(rhs.value_)
 124     {
 125     }
 126
 127     virtual Type_privateData *GetType() const {
 128         return NULL;
 129     }
 130 };
 131
 132 struct CYOwned :
 133     CYValue
 134 {
 135   private:
 136     JSGlobalContextRef context_;
 137     JSObjectRef owner_;
 138
 139   public:
 140     CYOwned(void *value, JSContextRef context, JSObjectRef owner) :
 141         CYValue(value),
 142         context_(CYGetJSContext(context)),
 143         owner_(owner)
 144     {
 145         //XXX:JSGlobalContextRetain(context_);
 146         if (owner_ != NULL)
 147             JSValueProtect(context_, owner_);
 148     }
 149
 150     virtual ~CYOwned() {
 151         if (owner_ != NULL)
 152             JSValueUnprotect(context_, owner_);
 153         //XXX:JSGlobalContextRelease(context_);
 154     }
 155
 156     JSObjectRef GetOwner() const {
 157         return owner_;
 158     }
 159 };
 160
 161 namespace cy {
 162 struct Functor :
 163     CYValue
 164 {
 165   private:
 166     void set() {
 167         sig::sig_ffi_cif(*pool_, &sig::ObjectiveC, &signature_, &cif_);
 168     }
 169
 170   public:
 171     sig::Signature signature_;
 172     ffi_cif cif_;
 173
 174     Functor(const sig::Signature &signature, void (*value)()) :
 175         CYValue(reinterpret_cast<void *>(value))
 176     {
 177         sig::Copy(*pool_, signature_, signature);
 178         set();
 179     }
 180
 181     Functor(const char *encoding, void (*value)()) :
 182         CYValue(reinterpret_cast<void *>(value))
 183     {
 184         sig::Parse(*pool_, &signature_, encoding, &Structor_);
 185         set();
 186     }
 187
 188     void (*GetValue() const)() {
 189         return reinterpret_cast<void (*)()>(value_);
 190     }
 191
 192     static JSStaticFunction const * const StaticFunctions;
 193     static JSStaticValue const * const StaticValues;
 194 }; }
 195
 196 struct Closure_privateData :
 197     cy::Functor
 198 {
 199     JSGlobalContextRef context_;
 200     JSObjectRef function_;
 201
 202     Closure_privateData(JSContextRef context, JSObjectRef function, const sig::Signature &signature) :
 203         cy::Functor(signature, NULL),
 204         context_(CYGetJSContext(context)),
 205         function_(function)
 206     {
 207         //XXX:JSGlobalContextRetain(context_);
 208         JSValueProtect(context_, function_);
 209     }
 210
 211     virtual ~Closure_privateData() {
 212         JSValueUnprotect(context_, function_);
 213         //XXX:JSGlobalContextRelease(context_);
 214     }
 215 };
 216
 217 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const sig::Signature &signature, void (*callback)(ffi_cif *, void *, void **, void *));
 218 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef));
 219
 220 #endif/*CYCRIPT_INTERNAL_HPP*/