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      1 /*
      2  * Copyright 2011, The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_EXPORT_FOREACH_H_  // NOLINT
     18 #define _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_EXPORT_FOREACH_H_
     19 
     20 #include "llvm/ADT/StringRef.h"
     21 #include "llvm/Support/raw_ostream.h"
     22 
     23 #include "clang/AST/Decl.h"
     24 
     25 #include "slang_assert.h"
     26 #include "slang_rs_context.h"
     27 #include "slang_rs_exportable.h"
     28 #include "slang_rs_export_type.h"
     29 
     30 namespace clang {
     31   class FunctionDecl;
     32 }  // namespace clang
     33 
     34 namespace slang {
     35 
     36 // Base class for reflecting control-side forEach (currently for root()
     37 // functions that fit appropriate criteria)
     38 class RSExportForEach : public RSExportable {
     39  private:
     40   std::string mName;
     41   RSExportRecordType *mParamPacketType;
     42   RSExportType *mInType;
     43   RSExportType *mOutType;
     44   size_t numParams;
     45 
     46   unsigned int mMetadataEncoding;
     47 
     48   const clang::ParmVarDecl *mIn;
     49   const clang::ParmVarDecl *mOut;
     50   const clang::ParmVarDecl *mUsrData;
     51   const clang::ParmVarDecl *mX;
     52   const clang::ParmVarDecl *mY;
     53   const clang::ParmVarDecl *mZ;
     54   const clang::ParmVarDecl *mAr;
     55 
     56   // TODO(all): Add support for LOD/face when we have them
     57   RSExportForEach(RSContext *Context, const llvm::StringRef &Name,
     58          const clang::FunctionDecl *FD)
     59     : RSExportable(Context, RSExportable::EX_FOREACH),
     60       mName(Name.data(), Name.size()), mParamPacketType(NULL), mInType(NULL),
     61       mOutType(NULL), numParams(0), mMetadataEncoding(0),
     62       mIn(NULL), mOut(NULL), mUsrData(NULL),
     63       mX(NULL), mY(NULL), mZ(NULL), mAr(NULL) {
     64     return;
     65   }
     66 
     67   bool validateAndConstructParams(RSContext *Context,
     68                                   const clang::FunctionDecl *FD);
     69 
     70  public:
     71   static RSExportForEach *Create(RSContext *Context,
     72                                  const clang::FunctionDecl *FD);
     73 
     74   inline const std::string &getName() const {
     75     return mName;
     76   }
     77 
     78   inline size_t getNumParameters() const {
     79     return numParams;
     80   }
     81 
     82   inline bool hasIn() const {
     83     return (mIn != NULL);
     84   }
     85 
     86   inline bool hasOut() const {
     87     return (mOut != NULL);
     88   }
     89 
     90   inline bool hasUsrData() const {
     91     return (mUsrData != NULL);
     92   }
     93 
     94   inline const RSExportType *getInType() const {
     95     return mInType;
     96   }
     97 
     98   inline const RSExportType *getOutType() const {
     99     return mOutType;
    100   }
    101 
    102   inline const RSExportRecordType *getParamPacketType() const {
    103     return mParamPacketType;
    104   }
    105 
    106   inline unsigned int getMetadataEncoding() const {
    107     return mMetadataEncoding;
    108   }
    109 
    110   typedef RSExportRecordType::const_field_iterator const_param_iterator;
    111 
    112   inline const_param_iterator params_begin() const {
    113     slangAssert((mParamPacketType != NULL) &&
    114                 "Get parameter from export foreach having no parameter!");
    115     return mParamPacketType->fields_begin();
    116   }
    117 
    118   inline const_param_iterator params_end() const {
    119     slangAssert((mParamPacketType != NULL) &&
    120                 "Get parameter from export foreach having no parameter!");
    121     return mParamPacketType->fields_end();
    122   }
    123 
    124   inline static bool isInitRSFunc(const clang::FunctionDecl *FD) {
    125     if (!FD) {
    126       return false;
    127     }
    128     const llvm::StringRef Name = FD->getName();
    129     static llvm::StringRef FuncInit("init");
    130     return Name.equals(FuncInit);
    131   }
    132 
    133   inline static bool isRootRSFunc(const clang::FunctionDecl *FD) {
    134     if (!FD) {
    135       return false;
    136     }
    137     const llvm::StringRef Name = FD->getName();
    138     static llvm::StringRef FuncRoot("root");
    139     return Name.equals(FuncRoot);
    140   }
    141 
    142   inline static bool isDtorRSFunc(const clang::FunctionDecl *FD) {
    143     if (!FD) {
    144       return false;
    145     }
    146     const llvm::StringRef Name = FD->getName();
    147     static llvm::StringRef FuncDtor(".rs.dtor");
    148     return Name.equals(FuncDtor);
    149   }
    150 
    151   static bool isRSForEachFunc(int targetAPI, const clang::FunctionDecl *FD);
    152 
    153   inline static bool isSpecialRSFunc(const clang::FunctionDecl *FD) {
    154     return isRootRSFunc(FD) || isInitRSFunc(FD) || isDtorRSFunc(FD);
    155   }
    156 
    157   static bool validateSpecialFuncDecl(int targetAPI,
    158                                       clang::Diagnostic *Diags,
    159                                       const clang::FunctionDecl *FD);
    160 };  // RSExportForEach
    161 
    162 }  // namespace slang
    163 
    164 #endif  // _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_EXPORT_FOREACH_H_  NOLINT
    165