Initial checkin of gRPC to third_party/

third_party/grpc/include/grpc/impl/codegen/slice_buffer.h

Index: third_party/grpc/include/grpc/impl/codegen/slice_buffer.h
diff --git a/third_party/grpc/include/grpc/impl/codegen/slice_buffer.h b/third_party/grpc/include/grpc/impl/codegen/slice_buffer.h
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index 0000000000000000000000000000000000000000..4fe909ee82a3332a85410f6418ef4c9c94ba3c30
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+++ b/third_party/grpc/include/grpc/impl/codegen/slice_buffer.h
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+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * 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 Inc. 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 THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS 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 GRPC_IMPL_CODEGEN_SLICE_BUFFER_H
+#define GRPC_IMPL_CODEGEN_SLICE_BUFFER_H
+
+#include <grpc/impl/codegen/slice.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GRPC_SLICE_BUFFER_INLINE_ELEMENTS 8
+
+/* Represents an expandable array of slices, to be interpreted as a single item
+   TODO(ctiller): inline some small number of elements into the struct, to
+                  avoid per-call allocations */
+typedef struct {
+  /* slices in the array */
+  gpr_slice *slices;
+  /* the number of slices in the array */
+  size_t count;
+  /* the number of slices allocated in the array */
+  size_t capacity;
+  /* the combined length of all slices in the array */
+  size_t length;
+  /* inlined elements to avoid allocations */
+  gpr_slice inlined[GRPC_SLICE_BUFFER_INLINE_ELEMENTS];
+} gpr_slice_buffer;
+
+/* initialize a slice buffer */
+GPRAPI void gpr_slice_buffer_init(gpr_slice_buffer *sb);
+/* destroy a slice buffer - unrefs any held elements */
+GPRAPI void gpr_slice_buffer_destroy(gpr_slice_buffer *sb);
+/* Add an element to a slice buffer - takes ownership of the slice.
+   This function is allowed to concatenate the passed in slice to the end of
+   some other slice if desired by the slice buffer. */
+GPRAPI void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice slice);
+/* add an element to a slice buffer - takes ownership of the slice and returns
+   the index of the slice.
+   Guarantees that the slice will not be concatenated at the end of another
+   slice (i.e. the data for this slice will begin at the first byte of the
+   slice at the returned index in sb->slices)
+   The implementation MAY decide to concatenate data at the end of a small
+   slice added in this fashion. */
+GPRAPI size_t
+gpr_slice_buffer_add_indexed(gpr_slice_buffer *sb, gpr_slice slice);
+GPRAPI void gpr_slice_buffer_addn(gpr_slice_buffer *sb, gpr_slice *slices,
+                                  size_t n);
+/* add a very small (less than 8 bytes) amount of data to the end of a slice
+   buffer: returns a pointer into which to add the data */
+GPRAPI uint8_t *gpr_slice_buffer_tiny_add(gpr_slice_buffer *sb, size_t len);
+/* pop the last buffer, but don't unref it */
+GPRAPI void gpr_slice_buffer_pop(gpr_slice_buffer *sb);
+/* clear a slice buffer, unref all elements */
+GPRAPI void gpr_slice_buffer_reset_and_unref(gpr_slice_buffer *sb);
+/* swap the contents of two slice buffers */
+GPRAPI void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b);
+/* move all of the elements of src into dst */
+GPRAPI void gpr_slice_buffer_move_into(gpr_slice_buffer *src,
+                                       gpr_slice_buffer *dst);
+/* remove n bytes from the end of a slice buffer */
+GPRAPI void gpr_slice_buffer_trim_end(gpr_slice_buffer *src, size_t n,
+                                      gpr_slice_buffer *garbage);
+/* move the first n bytes of src into dst */
+GPRAPI void gpr_slice_buffer_move_first(gpr_slice_buffer *src, size_t n,
+                                        gpr_slice_buffer *dst);
+/* take the first slice in the slice buffer */
+GPRAPI gpr_slice gpr_slice_buffer_take_first(gpr_slice_buffer *src);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GRPC_IMPL_CODEGEN_SLICE_BUFFER_H */