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Diffstat (limited to 'src/message.h')
| -rw-r--r-- | src/message.h | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/src/message.h b/src/message.h deleted file mode 100644 index 15a9330..0000000 --- a/src/message.h +++ /dev/null @@ -1,153 +0,0 @@ -/** - * coopgammad -- Cooperative gamma server - * Copyright (C) 2016 Mattias Andrée (maandree@kth.se) - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ -#include <stddef.h> -#include <limits.h> - - - -#ifndef GCC_ONLY -# if defined(__GNUC__) && !defined(__clang__) -# define GCC_ONLY(...) __VA_ARGS__ -# else -# define GCC_ONLY(...) /* nothing */ -# endif -#endif - - - -/** - * Message passed between a server and a client - */ -struct message -{ - /** - * The headers in the message, each element in this list - * as an unparsed header, it consists of both the header - * name and its associated value, joined by ": ". A header - * cannot be `NULL` (unless its memory allocation failed,) - * but `headers` itself is `NULL` if there are no headers. - * The "Length" header should be included in this list. - */ - char** restrict headers; - - /** - * The number of headers in the message - */ - size_t header_count; - - /** - * The payload of the message, `NULL` if none (of zero-length) - */ - char* restrict payload; - - /** - * The size of the payload - */ - size_t payload_size; - - /** - * How much of the payload that has been stored (internal data) - */ - size_t payload_ptr; - - /** - * Internal buffer for the reading function (internal data) - */ - char* restrict buffer; - - /** - * The size allocated to `buffer` (internal data) - */ - size_t buffer_size; - - /** - * The number of bytes used in `buffer` (internal data) - */ - size_t buffer_ptr; - - /** - * 0 while reading headers, 1 while reading payload, and 2 when done (internal data) - */ - int stage; - -#if INT_MAX != LONG_MAX - int padding__; -#endif - -}; - - - -/** - * Initialise a message slot so that it can - * be used by to read messages - * - * @param this Memory slot in which to store the new message - * @return Non-zero on error, `errno` will be set accordingly - */ -GCC_ONLY(__attribute__((nonnull))) -int message_initialise(struct message* restrict this); - -/** - * Release all resources in a message, should - * be done even if initialisation fails - * - * @param this The message - */ -GCC_ONLY(__attribute__((nonnull))) -void message_destroy(struct message* restrict this); - -/** - * Marshal a message for state serialisation - * - * @param this The message - * @param buf Output buffer for the marshalled data, - * `NULL` just measure how large the buffers - * needs to be - * @return The number of marshalled byte - */ -GCC_ONLY(__attribute__((nonnull(1)))) -size_t message_marshal(const struct message* restrict this, void* restrict buf); - -/** - * Unmarshal a message for state deserialisation - * - * @param this Memory slot in which to store the new message - * @param buf In buffer with the marshalled data - * @return The number of unmarshalled bytes, 0 on error - */ -GCC_ONLY(__attribute__((nonnull))) -size_t message_unmarshal(struct message* restrict this, const void* restrict buf); - -/** - * Read the next message from a file descriptor - * - * @param this Memory slot in which to store the new message - * @param fd The file descriptor - * @return 0: At least one message is available - * -1: Exceptional connection: - * EINTR: System call interrupted - * EAGAIN: No message is available - * EWOULDBLOCK: No message is available - * ECONNRESET: Connection closed - * Other: Failure - * -2: Corrupt message (unrecoverable) - */ -GCC_ONLY(__attribute__((nonnull))) -int message_read(struct message* restrict this, int fd); - |