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 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(apr_pool_t *pool, const char *type) :
  57         ffi_(NULL)
  58     {
  59         _assert(pool != NULL);
  60         pool_ = pool;
  61         sig::Signature signature;
  62         sig::Parse(pool_, &signature, type, &Structor_);
  63         type_ = signature.elements[0].type;
  64     }
  65
  66     Type_privateData(const char *type) :
  67         ffi_(NULL)
  68     {
  69         sig::Signature signature;
  70         sig::Parse(pool_, &signature, type, &Structor_);
  71         type_ = signature.elements[0].type;
  72     }
  73
  74     Type_privateData(sig::Type *type) :
  75         ffi_(NULL)
  76     {
  77         if (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             ffi_ = new(pool_) ffi_type;
  90
  91             sig::Element element;
  92             element.name = NULL;
  93             element.type = type_;
  94             element.offset = 0;
  95
  96             sig::Signature signature;
  97             signature.elements = &element;
  98             signature.count = 1;
  99
 100             ffi_cif cif;
 101             sig::sig_ffi_cif(pool_, &sig::ObjectiveC, &signature, &cif);
 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     sig::Signature signature_;
 166     ffi_cif cif_;
 167
 168     Functor(const char *type, void (*value)()) :
 169         CYValue(reinterpret_cast<void *>(value))
 170     {
 171         sig::Parse(pool_, &signature_, type, &Structor_);
 172         sig::sig_ffi_cif(pool_, &sig::ObjectiveC, &signature_, &cif_);
 173     }
 174
 175     void (*GetValue() const)() {
 176         return reinterpret_cast<void (*)()>(value_);
 177     }
 178
 179     static JSStaticFunction const * const StaticFunctions;
 180 }; }
 181
 182 struct Closure_privateData :
 183     cy::Functor
 184 {
 185     JSGlobalContextRef context_;
 186     JSObjectRef function_;
 187
 188     Closure_privateData(JSContextRef context, JSObjectRef function, const char *type) :
 189         cy::Functor(type, NULL),
 190         context_(CYGetJSContext(context)),
 191         function_(function)
 192     {
 193         //XXX:JSGlobalContextRetain(context_);
 194         JSValueProtect(context_, function_);
 195     }
 196
 197     virtual ~Closure_privateData() {
 198         JSValueUnprotect(context_, function_);
 199         //XXX:JSGlobalContextRelease(context_);
 200     }
 201 };
 202
 203 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *));
 204 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef));
 205
 206 #endif/*CYCRIPT_INTERNAL_HPP*/