diff options
Diffstat (limited to 'grpc/third_party/upb/upb/upb_internal.h')
-rw-r--r-- | grpc/third_party/upb/upb/upb_internal.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/grpc/third_party/upb/upb/upb_internal.h b/grpc/third_party/upb/upb/upb_internal.h new file mode 100644 index 00000000..1eb166f7 --- /dev/null +++ b/grpc/third_party/upb/upb/upb_internal.h @@ -0,0 +1,68 @@ +/* + * 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_INT_H_ +#define UPB_INT_H_ + +#include "upb/upb.h" + +struct mem_block; +typedef struct mem_block mem_block; + +struct upb_Arena { + _upb_ArenaHead head; + /* Stores cleanup metadata for this arena. + * - a pointer to the current cleanup counter. + * - a boolean indicating if there is an unowned initial block. */ + uintptr_t cleanup_metadata; + + /* Allocator to allocate arena blocks. We are responsible for freeing these + * when we are destroyed. */ + upb_alloc* block_alloc; + uint32_t last_size; + + /* When multiple arenas are fused together, each arena points to a parent + * arena (root points to itself). The root tracks how many live arenas + * reference it. */ + uint32_t refcount; /* Only used when a->parent == a */ + struct upb_Arena* parent; + + /* Linked list of blocks to free/cleanup. */ + mem_block *freelist, *freelist_tail; +}; + +// Encodes a float or double that is round-trippable, but as short as possible. +// These routines are not fully optimal (not guaranteed to be shortest), but are +// short-ish and match the implementation that has been used in protobuf since +// the beginning. +// +// The given buffer size must be at least kUpb_RoundTripBufferSize. +enum { kUpb_RoundTripBufferSize = 32 }; +void _upb_EncodeRoundTripDouble(double val, char* buf, size_t size); +void _upb_EncodeRoundTripFloat(float val, char* buf, size_t size); + +#endif /* UPB_INT_H_ */ |