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bf8b699f64
bzip2/lz4/lzma/lzo/snappy compression is now provided via *services* they're almost like normal services, but in include/providers/ and they're supposed to provide exactly the same interface as original compression libraries (but not everything, only enough of if for the code to compile). the services are implemented via dummy functions that return corresponding error values (LZMA_PROG_ERROR, LZO_E_INTERNAL_ERROR, etc). the actual compression libraries are linked into corresponding provider plugins. Providers are daemon plugins that when loaded replace service pointers to point to actual compression functions. That is, run-time dependency on compression libraries is now on plugins, and the server doesn't need any compression libraries to run, but will automatically support the compression when a plugin is loaded. InnoDB and Mroonga use compression plugins now. RocksDB doesn't, because it comes with standalone utility binaries that cannot load plugins.
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/**
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@file lz4.h
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This service provides dynamic access to LZ4.
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*/
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#ifndef LZ4_INCLUDED
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef MYSQL_ABI_CHECK
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#endif
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#ifndef LZ4_VERSION_NUMBER
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#define LZ4_MAX_INPUT_SIZE 0x7E000000
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#define LZ4_compressBound(...) provider_service_lz4->LZ4_compressBound_ptr (__VA_ARGS__)
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#define LZ4_compress_default(...) provider_service_lz4->LZ4_compress_default_ptr (__VA_ARGS__)
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#define LZ4_decompress_safe(...) provider_service_lz4->LZ4_decompress_safe_ptr (__VA_ARGS__)
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#endif
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#define DEFINE_LZ4_compressBound(NAME) NAME( \
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int inputSize \
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)
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#define DEFINE_LZ4_compress_default(NAME) NAME( \
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const char *src, \
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char *dst, \
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int srcSize, \
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int dstCapacity \
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)
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#define DEFINE_LZ4_decompress_safe(NAME) NAME( \
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const char *src, \
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char *dst, \
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int compressedSize, \
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int dstCapacity \
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)
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struct provider_service_lz4_st
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{
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int DEFINE_LZ4_compressBound((*LZ4_compressBound_ptr));
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int DEFINE_LZ4_compress_default((*LZ4_compress_default_ptr));
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int DEFINE_LZ4_decompress_safe((*LZ4_decompress_safe_ptr));
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bool is_loaded;
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};
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extern struct provider_service_lz4_st *provider_service_lz4;
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#ifdef __cplusplus
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}
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#endif
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#define LZ4_INCLUDED
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#endif
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