zstdmt_compress.h

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/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 * All rights reserved.
 *
 * This source code is licensed under both the BSD-style license (found in the
 * LICENSE file in the root directory of this source tree) and the GPLv2 (found
 * in the COPYING file in the root directory of this source tree).
 * You may select, at your option, one of the above-listed licenses.
 */
 
 #ifndef ZSTDMT_COMPRESS_H
 #define ZSTDMT_COMPRESS_H
 
 #if defined (__cplusplus)
 extern "C" {
 #endif
 
 
/* Note : This is an internal API.
 *        These APIs used to be exposed with ZSTDLIB_API,
 *        because it used to be the only way to invoke MT compression.
 *        Now, you must use ZSTD_compress2 and ZSTD_compressStream2() instead.
 *
 *        This API requires ZSTD_MULTITHREAD to be defined during compilation,
 *        otherwise ZSTDMT_createCCtx*() will fail.
 */
 
/* ===   Dependencies   === */
#include "../common/zstd_deps.h"   /* size_t */
#define ZSTD_STATIC_LINKING_ONLY   /* ZSTD_parameters */
#include "../zstd.h"            /* ZSTD_inBuffer, ZSTD_outBuffer, ZSTDLIB_API */
 
 
/* ===   Constants   === */
#ifndef ZSTDMT_NBWORKERS_MAX /* a different value can be selected at compile time */
#  define ZSTDMT_NBWORKERS_MAX ((sizeof(void*)==4) /*32-bit*/ ? 64 : 256)
#endif
#ifndef ZSTDMT_JOBSIZE_MIN   /* a different value can be selected at compile time */
#  define ZSTDMT_JOBSIZE_MIN (512 KB)
#endif
#define ZSTDMT_JOBLOG_MAX   (MEM_32bits() ? 29 : 30)
#define ZSTDMT_JOBSIZE_MAX  (MEM_32bits() ? (512 MB) : (1024 MB))
 
 
/* ========================================================
 * ===  Private interface, for use by ZSTD_compress.c   ===
 * ===  Not exposed in libzstd. Never invoke directly   ===
 * ======================================================== */
 
/* ===   Memory management   === */
typedef struct ZSTDMT_CCtx_s ZSTDMT_CCtx;
/* Requires ZSTD_MULTITHREAD to be defined during compilation, otherwise it will return NULL. */
ZSTDMT_CCtx* ZSTDMT_createCCtx_advanced(unsigned nbWorkers,
                                        ZSTD_customMem cMem,
                    ZSTD_threadPool *pool);
size_t ZSTDMT_freeCCtx(ZSTDMT_CCtx* mtctx);
 
size_t ZSTDMT_sizeof_CCtx(ZSTDMT_CCtx* mtctx);
 
/* ===   Streaming functions   === */
 
size_t ZSTDMT_nextInputSizeHint(const ZSTDMT_CCtx* mtctx);
 
size_t ZSTDMT_initCStream_internal(ZSTDMT_CCtx* mtctx,
                    const void* dict, size_t dictSize, ZSTD_dictContentType_e dictContentType,
                    const ZSTD_CDict* cdict,
                    ZSTD_CCtx_params params, unsigned long long pledgedSrcSize);
 
size_t ZSTDMT_compressStream_generic(ZSTDMT_CCtx* mtctx,
                                     ZSTD_outBuffer* output,
                                     ZSTD_inBuffer* input,
                                     ZSTD_EndDirective endOp);
 
size_t ZSTDMT_toFlushNow(ZSTDMT_CCtx* mtctx);
 
void ZSTDMT_updateCParams_whileCompressing(ZSTDMT_CCtx* mtctx, const ZSTD_CCtx_params* cctxParams);
 
ZSTD_frameProgression ZSTDMT_getFrameProgression(ZSTDMT_CCtx* mtctx);
 
 
#if defined (__cplusplus)
}
#endif
 
#endif   /* ZSTDMT_COMPRESS_H */