| // Copyright (c) 2009-2021, Google LLC |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // * Neither the name of Google LLC nor the |
| // names of its contributors may be used to endorse or promote products |
| // derived from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| // ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT, |
| // INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef UPB_HPP_ |
| #define UPB_HPP_ |
| |
| #include <memory> |
| |
| #include "upb/base/descriptor_constants.h" |
| #include "upb/base/status.h" |
| #include "upb/mem/arena.h" |
| |
| namespace upb { |
| |
| class Status { |
| public: |
| Status() { upb_Status_Clear(&status_); } |
| |
| upb_Status* ptr() { return &status_; } |
| |
| // Returns true if there is no error. |
| bool ok() const { return upb_Status_IsOk(&status_); } |
| |
| // Guaranteed to be NULL-terminated. |
| const char* error_message() const { |
| return upb_Status_ErrorMessage(&status_); |
| } |
| |
| // The error message will be truncated if it is longer than |
| // _kUpb_Status_MaxMessage-4. |
| void SetErrorMessage(const char* msg) { |
| upb_Status_SetErrorMessage(&status_, msg); |
| } |
| void SetFormattedErrorMessage(const char* fmt, ...) { |
| va_list args; |
| va_start(args, fmt); |
| upb_Status_VSetErrorFormat(&status_, fmt, args); |
| va_end(args); |
| } |
| |
| // Resets the status to a successful state with no message. |
| void Clear() { upb_Status_Clear(&status_); } |
| |
| private: |
| upb_Status status_; |
| }; |
| |
| class Arena { |
| public: |
| // A simple arena with no initial memory block and the default allocator. |
| Arena() : ptr_(upb_Arena_New(), upb_Arena_Free) {} |
| Arena(char* initial_block, size_t size) |
| : ptr_(upb_Arena_Init(initial_block, size, &upb_alloc_global), |
| upb_Arena_Free) {} |
| |
| upb_Arena* ptr() const { return ptr_.get(); } |
| |
| void Fuse(Arena& other) { upb_Arena_Fuse(ptr(), other.ptr()); } |
| |
| protected: |
| std::unique_ptr<upb_Arena, decltype(&upb_Arena_Free)> ptr_; |
| }; |
| |
| // InlinedArena seeds the arenas with a predefined amount of memory. No |
| // heap memory will be allocated until the initial block is exceeded. |
| template <int N> |
| class InlinedArena : public Arena { |
| public: |
| InlinedArena() : Arena(initial_block_, N) {} |
| ~InlinedArena() { |
| // Explicitly destroy the arena now so that it does not outlive |
| // initial_block_. |
| ptr_.reset(); |
| } |
| |
| private: |
| InlinedArena(const InlinedArena*) = delete; |
| InlinedArena& operator=(const InlinedArena*) = delete; |
| |
| char initial_block_[N]; |
| }; |
| |
| } // namespace upb |
| |
| #endif // UPB_HPP_ |