Internal.hpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2012  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser 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 "Pooling.hpp"
  26
  27 #include <JavaScriptCore/JSBase.h>
  28 #include <JavaScriptCore/JSContextRef.h>
  29 #include <JavaScriptCore/JSObjectRef.h>
  30 #include <JavaScriptCore/JSValueRef.h>
  31
  32 #include <sig/parse.hpp>
  33 #include <sig/ffi_type.hpp>
  34
  35 JSGlobalContextRef CYGetJSContext(JSContextRef context);
  36 void Structor_(apr_pool_t *pool, sig::Type *&type);
  37
  38 struct Type_privateData :
  39     CYData
  40 {
  41     static JSClassRef Class_;
  42
  43     ffi_type *ffi_;
  44     sig::Type *type_;
  45
  46     void Set(sig::Type *type) {
  47         type_ = new(pool_) sig::Type;
  48         sig::Copy(pool_, *type_, *type);
  49     }
  50
  51     Type_privateData(apr_pool_t *pool, const char *type) :
  52         ffi_(NULL)
  53     {
  54         _assert(pool != NULL);
  55         pool_ = pool;
  56         sig::Signature signature;
  57         sig::Parse(pool_, &signature, type, &Structor_);
  58         type_ = signature.elements[0].type;
  59     }
  60
  61     Type_privateData(const char *type) :
  62         ffi_(NULL)
  63     {
  64         sig::Signature signature;
  65         sig::Parse(pool_, &signature, type, &Structor_);
  66         type_ = signature.elements[0].type;
  67     }
  68
  69     Type_privateData(sig::Type *type) :
  70         ffi_(NULL)
  71     {
  72         if (type != NULL)
  73             Set(type);
  74     }
  75
  76     Type_privateData(sig::Type *type, ffi_type *ffi) {
  77         ffi_ = new(pool_) ffi_type;
  78         sig::Copy(pool_, *ffi_, *ffi);
  79         Set(type);
  80     }
  81
  82     ffi_type *GetFFI() {
  83         if (ffi_ == NULL) {
  84             ffi_ = new(pool_) ffi_type;
  85
  86             sig::Element element;
  87             element.name = NULL;
  88             element.type = type_;
  89             element.offset = 0;
  90
  91             sig::Signature signature;
  92             signature.elements = &element;
  93             signature.count = 1;
  94
  95             ffi_cif cif;
  96             sig::sig_ffi_cif(pool_, &sig::ObjectiveC, &signature, &cif);
  97             *ffi_ = *cif.rtype;
  98         }
  99
 100         return ffi_;
 101     }
 102 };
 103
 104 struct CYValue :
 105     CYData
 106 {
 107     void *value_;
 108
 109     CYValue() {
 110     }
 111
 112     CYValue(const void *value) :
 113         value_(const_cast<void *>(value))
 114     {
 115     }
 116
 117     CYValue(const CYValue &rhs) :
 118         value_(rhs.value_)
 119     {
 120     }
 121
 122     virtual Type_privateData *GetType() const {
 123         return NULL;
 124     }
 125 };
 126
 127 struct CYOwned :
 128     CYValue
 129 {
 130   private:
 131     JSGlobalContextRef context_;
 132     JSObjectRef owner_;
 133
 134   public:
 135     CYOwned(void *value, JSContextRef context, JSObjectRef owner) :
 136         CYValue(value),
 137         context_(CYGetJSContext(context)),
 138         owner_(owner)
 139     {
 140         //XXX:JSGlobalContextRetain(context_);
 141         if (owner_ != NULL)
 142             JSValueProtect(context_, owner_);
 143     }
 144
 145     virtual ~CYOwned() {
 146         if (owner_ != NULL)
 147             JSValueUnprotect(context_, owner_);
 148         //XXX:JSGlobalContextRelease(context_);
 149     }
 150
 151     JSObjectRef GetOwner() const {
 152         return owner_;
 153     }
 154 };
 155
 156 namespace cy {
 157 struct Functor :
 158     CYValue
 159 {
 160     sig::Signature signature_;
 161     ffi_cif cif_;
 162
 163     Functor(const char *type, void (*value)()) :
 164         CYValue(reinterpret_cast<void *>(value))
 165     {
 166         sig::Parse(pool_, &signature_, type, &Structor_);
 167         sig::sig_ffi_cif(pool_, &sig::ObjectiveC, &signature_, &cif_);
 168     }
 169
 170     void (*GetValue())() const {
 171         return reinterpret_cast<void (*)()>(value_);
 172     }
 173
 174     static JSStaticFunction const * const StaticFunctions;
 175 }; }
 176
 177 struct Closure_privateData :
 178     cy::Functor
 179 {
 180     JSGlobalContextRef context_;
 181     JSObjectRef function_;
 182
 183     Closure_privateData(JSContextRef context, JSObjectRef function, const char *type) :
 184         cy::Functor(type, NULL),
 185         context_(CYGetJSContext(context)),
 186         function_(function)
 187     {
 188         //XXX:JSGlobalContextRetain(context_);
 189         JSValueProtect(context_, function_);
 190     }
 191
 192     virtual ~Closure_privateData() {
 193         JSValueUnprotect(context_, function_);
 194         //XXX:JSGlobalContextRelease(context_);
 195     }
 196 };
 197
 198 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *));
 199
 200 #endif/*CYCRIPT_INTERNAL_HPP*/