third_party/grpc/src/core/channel/channel_args.h

/*
 *
 * Copyright 2015, Google Inc.
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 * modification, are permitted provided that the following conditions are
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 *
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#ifndef GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_ARGS_H
#define GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_ARGS_H

#include <grpc/compression.h>
#include <grpc/grpc.h>

/* Copy some arguments */
grpc_channel_args *grpc_channel_args_copy(const grpc_channel_args *src);

/** Copy some arguments and add the to_add parameter in the end.
   If to_add is NULL, it is equivalent to call grpc_channel_args_copy. */
grpc_channel_args *grpc_channel_args_copy_and_add(const grpc_channel_args *src,
                                                  const grpc_arg *to_add,
                                                  size_t num_to_add);

/** Copy args from a then args from b into a new channel args */
grpc_channel_args *grpc_channel_args_merge(const grpc_channel_args *a,
                                           const grpc_channel_args *b);

/** Destroy arguments created by grpc_channel_args_copy */
void grpc_channel_args_destroy(grpc_channel_args *a);

/** Reads census_enabled settings from channel args. Returns 1 if census_enabled
 * is specified in channel args, otherwise returns 0. */
int grpc_channel_args_is_census_enabled(const grpc_channel_args *a);

/** Returns the compression algorithm set in \a a. */
grpc_compression_algorithm grpc_channel_args_get_compression_algorithm(
    const grpc_channel_args *a);

/** Returns a channel arg instance with compression enabled. If \a a is
 * non-NULL, its args are copied. N.B. GRPC_COMPRESS_NONE disables compression
 * for the channel. */
grpc_channel_args *grpc_channel_args_set_compression_algorithm(
    grpc_channel_args *a, grpc_compression_algorithm algorithm);

/** Sets the support for the given compression algorithm. By default, all
 * compression algorithms are enabled. It's an error to disable an algorithm set
 * by grpc_channel_args_set_compression_algorithm.
 *
 * Returns an instance with the updated algorithm states. The \a a pointer is
 * modified to point to the returned instance (which may be different from the
 * input value of \a a). */
grpc_channel_args *grpc_channel_args_compression_algorithm_set_state(
    grpc_channel_args **a, grpc_compression_algorithm algorithm, int enabled);

/** Returns the bitset representing the support state (true for enabled, false
 * for disabled) for compression algorithms.
 *
 * The i-th bit of the returned bitset corresponds to the i-th entry in the
 * grpc_compression_algorithm enum. */
int grpc_channel_args_compression_algorithm_get_states(
    const grpc_channel_args *a);

#endif /* GRPC_INTERNAL_CORE_CHANNEL_CHANNEL_ARGS_H */