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 struct Type_privateData :
  42     CYData
  43 {
  44     static JSClassRef Class_;
  45
  46     ffi_type *ffi_;
  47     sig::Type *type_;
  48
  49     void Set(sig::Type *type) {
  50         type_ = new(pool_) sig::Type;
  51         sig::Copy(pool_, *type_, *type);
  52     }
  53
  54     Type_privateData(apr_pool_t *pool, const char *type) :
  55         ffi_(NULL)
  56     {
  57         _assert(pool != NULL);
  58         pool_ = pool;
  59         sig::Signature signature;
  60         sig::Parse(pool_, &signature, type, &Structor_);
  61         type_ = signature.elements[0].type;
  62     }
  63
  64     Type_privateData(const char *type) :
  65         ffi_(NULL)
  66     {
  67         sig::Signature signature;
  68         sig::Parse(pool_, &signature, type, &Structor_);
  69         type_ = signature.elements[0].type;
  70     }
  71
  72     Type_privateData(sig::Type *type) :
  73         ffi_(NULL)
  74     {
  75         if (type != NULL)
  76             Set(type);
  77     }
  78
  79     Type_privateData(sig::Type *type, ffi_type *ffi) {
  80         ffi_ = new(pool_) ffi_type;
  81         sig::Copy(pool_, *ffi_, *ffi);
  82         Set(type);
  83     }
  84
  85     ffi_type *GetFFI() {
  86         if (ffi_ == NULL) {
  87             ffi_ = new(pool_) ffi_type;
  88
  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             *ffi_ = *cif.rtype;
 101         }
 102
 103         return ffi_;
 104     }
 105 };
 106
 107 struct CYValue :
 108     CYData
 109 {
 110     void *value_;
 111
 112     CYValue() {
 113     }
 114
 115     CYValue(const void *value) :
 116         value_(const_cast<void *>(value))
 117     {
 118     }
 119
 120     CYValue(const CYValue &rhs) :
 121         value_(rhs.value_)
 122     {
 123     }
 124
 125     virtual Type_privateData *GetType() const {
 126         return NULL;
 127     }
 128 };
 129
 130 struct CYOwned :
 131     CYValue
 132 {
 133   private:
 134     JSGlobalContextRef context_;
 135     JSObjectRef owner_;
 136
 137   public:
 138     CYOwned(void *value, JSContextRef context, JSObjectRef owner) :
 139         CYValue(value),
 140         context_(CYGetJSContext(context)),
 141         owner_(owner)
 142     {
 143         //XXX:JSGlobalContextRetain(context_);
 144         if (owner_ != NULL)
 145             JSValueProtect(context_, owner_);
 146     }
 147
 148     virtual ~CYOwned() {
 149         if (owner_ != NULL)
 150             JSValueUnprotect(context_, owner_);
 151         //XXX:JSGlobalContextRelease(context_);
 152     }
 153
 154     JSObjectRef GetOwner() const {
 155         return owner_;
 156     }
 157 };
 158
 159 namespace cy {
 160 struct Functor :
 161     CYValue
 162 {
 163     sig::Signature signature_;
 164     ffi_cif cif_;
 165
 166     Functor(const char *type, void (*value)()) :
 167         CYValue(reinterpret_cast<void *>(value))
 168     {
 169         sig::Parse(pool_, &signature_, type, &Structor_);
 170         sig::sig_ffi_cif(pool_, &sig::ObjectiveC, &signature_, &cif_);
 171     }
 172
 173     void (*GetValue())() const {
 174         return reinterpret_cast<void (*)()>(value_);
 175     }
 176
 177     static JSStaticFunction const * const StaticFunctions;
 178 }; }
 179
 180 struct Closure_privateData :
 181     cy::Functor
 182 {
 183     JSGlobalContextRef context_;
 184     JSObjectRef function_;
 185
 186     Closure_privateData(JSContextRef context, JSObjectRef function, const char *type) :
 187         cy::Functor(type, NULL),
 188         context_(CYGetJSContext(context)),
 189         function_(function)
 190     {
 191         //XXX:JSGlobalContextRetain(context_);
 192         JSValueProtect(context_, function_);
 193     }
 194
 195     virtual ~Closure_privateData() {
 196         JSValueUnprotect(context_, function_);
 197         //XXX:JSGlobalContextRelease(context_);
 198     }
 199 };
 200
 201 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *));
 202 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef));
 203
 204 #endif/*CYCRIPT_INTERNAL_HPP*/