--- /dev/null
+#ifndef _WIMLIB_COMPRESS_CHUNK_H
+#define _WIMLIB_COMPRESS_CHUNK_H
+
+#include <wimlib/types.h>
+
+struct wimlib_lzx_context;
+
+unsigned
+compress_chunk(const void * uncompressed_data,
+ unsigned uncompressed_len,
+ void *compressed_data,
+ int out_ctype,
+ struct wimlib_lzx_context *comp_ctx);
+
+/* Interface for chunk compression. Users can submit chunks of data to be
+ * compressed, then retrieve them later in order. This interface can be
+ * implemented either in serial (having the calling thread compress the chunks
+ * itself) or in parallel (having other threads asynchronously compress the
+ * chunks). */
+struct chunk_compressor {
+ /* Variables set by the chunk compressor when it is created. */
+ int out_ctype;
+ u32 out_chunk_size;
+ unsigned num_threads;
+
+ /* Free the chunk compressor. */
+ void (*destroy)(struct chunk_compressor *);
+
+ /* Submit a chunk of uncompressed data for compression.
+ *
+ * The chunk must have size greater than 0 and less than or equal to
+ * @out_chunk_size.
+ *
+ * The return value is %true if the chunk was successfully submitted, or
+ * %false if the chunk compressor does not have space for the chunk at
+ * the present time. In the latter case, get_chunk() must be called to
+ * retrieve a compressed chunk before trying again. */
+ bool (*submit_chunk)(struct chunk_compressor *, const void *, size_t);
+
+ /* Get the next chunk of compressed data.
+ *
+ * The compressed data, along with its size and the size of the original
+ * uncompressed chunk, are returned in the locations pointed to by
+ * arguments 2-4. The compressed data is in storage internal to the
+ * chunk compressor, and it cannot be accessed beyond any subsequent
+ * calls to the chunk compressor.
+ *
+ * Chunks will be returned in the same order in which they were
+ * submitted for compression.
+ *
+ * The resulting compressed length may be up to the uncompressed length.
+ * In the case where they are equal, the returned data is actually the
+ * uncompressed data, not the compressed data.
+ *
+ * The return value is %true if a chunk of compressed data was
+ * successfully retrieved, or %false if there are no chunks currently
+ * being compressed. */
+ bool (*get_chunk)(struct chunk_compressor *,
+ const void **, unsigned *, unsigned *);
+};
+
+
+/* Functions that return implementations of the chunk_compressor interface. */
+
+int
+new_parallel_chunk_compressor(int out_ctype, u32 out_chunk_size,
+ unsigned num_threads, u64 max_memory,
+ struct chunk_compressor **compressor_ret);
+
+int
+new_serial_chunk_compressor(int out_ctype, u32 out_chunk_size,
+ struct wimlib_lzx_context *comp_ctx,
+ struct chunk_compressor **compressor_ret);
+
+#endif
--- /dev/null
+/*
+ * compress_parallel.c
+ *
+ * Compress chunks of data (parallel version).
+ */
+
+/*
+ * Copyright (C) 2013 Eric Biggers
+ *
+ * This file is part of wimlib, a library for working with WIM files.
+ *
+ * wimlib 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.
+ *
+ * wimlib 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
+ * wimlib; if not, see http://www.gnu.org/licenses/.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "wimlib/assert.h"
+#include "wimlib/compress_chunks.h"
+#include "wimlib/error.h"
+#include "wimlib/list.h"
+#include "wimlib/util.h"
+#ifdef __WIN32__
+# include "wimlib/win32.h" /* win32_get_number_of_processors() */
+#endif
+
+#include <errno.h>
+#include <limits.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+struct message_queue {
+ struct list_head list;
+ pthread_mutex_t lock;
+ pthread_cond_t msg_avail_cond;
+ pthread_cond_t space_avail_cond;
+ bool terminating;
+};
+
+struct compressor_thread_data {
+ pthread_t thread;
+ struct message_queue *chunks_to_compress_queue;
+ struct message_queue *compressed_chunks_queue;
+ int out_ctype;
+ u32 out_chunk_size;
+ struct wimlib_lzx_context *comp_ctx;
+};
+
+#define MAX_CHUNKS_PER_MSG 2
+
+struct message {
+ u8 *uncompressed_chunks[MAX_CHUNKS_PER_MSG];
+ u8 *compressed_chunks[MAX_CHUNKS_PER_MSG];
+ unsigned uncompressed_chunk_sizes[MAX_CHUNKS_PER_MSG];
+ unsigned compressed_chunk_sizes[MAX_CHUNKS_PER_MSG];
+ size_t num_filled_chunks;
+ size_t num_alloc_chunks;
+ struct list_head list;
+ bool complete;
+ struct list_head submission_list;
+};
+
+struct parallel_chunk_compressor {
+ struct chunk_compressor base;
+
+ struct message_queue chunks_to_compress_queue;
+ struct message_queue compressed_chunks_queue;
+ struct compressor_thread_data *thread_data;
+ unsigned num_threads;
+ unsigned num_started_threads;
+
+ struct message *msgs;
+ size_t num_messages;
+
+ struct list_head available_msgs;
+ struct list_head submitted_msgs;
+ struct message *next_submit_msg;
+ struct message *next_ready_msg;
+ size_t next_chunk_idx;
+};
+
+static unsigned
+get_default_num_threads(void)
+{
+ long n;
+#ifdef __WIN32__
+ n = win32_get_number_of_processors();
+#else
+ n = sysconf(_SC_NPROCESSORS_ONLN);
+#endif
+ if (n < 1 || n >= UINT_MAX) {
+ WARNING("Failed to determine number of processors; assuming 1.");
+ return 1;
+ }
+ return n;
+}
+
+static u64
+get_avail_memory(void)
+{
+#ifdef __WIN32__
+ u64 phys_bytes = win32_get_avail_memory();
+ if (phys_bytes == 0)
+ goto default_size;
+ return phys_bytes;
+#else
+ long page_size = sysconf(_SC_PAGESIZE);
+ long num_pages = sysconf(_SC_PHYS_PAGES);
+ if (page_size <= 0 || num_pages <= 0)
+ goto default_size;
+ return ((u64)page_size * (u64)num_pages);
+#endif
+
+default_size:
+ WARNING("Failed to determine available memory; assuming 1 GiB");
+ return 1U << 30;
+}
+
+static int
+message_queue_init(struct message_queue *q)
+{
+ if (pthread_mutex_init(&q->lock, NULL)) {
+ ERROR_WITH_ERRNO("Failed to initialize mutex");
+ goto err;
+ }
+ if (pthread_cond_init(&q->msg_avail_cond, NULL)) {
+ ERROR_WITH_ERRNO("Failed to initialize condition variable");
+ goto err_destroy_lock;
+ }
+ if (pthread_cond_init(&q->space_avail_cond, NULL)) {
+ ERROR_WITH_ERRNO("Failed to initialize condition variable");
+ goto err_destroy_msg_avail_cond;
+ }
+ INIT_LIST_HEAD(&q->list);
+ return 0;
+
+err_destroy_msg_avail_cond:
+ pthread_cond_destroy(&q->msg_avail_cond);
+err_destroy_lock:
+ pthread_mutex_destroy(&q->lock);
+err:
+ return WIMLIB_ERR_NOMEM;
+}
+
+static void
+message_queue_destroy(struct message_queue *q)
+{
+ if (q->list.next != NULL) {
+ pthread_mutex_destroy(&q->lock);
+ pthread_cond_destroy(&q->msg_avail_cond);
+ pthread_cond_destroy(&q->space_avail_cond);
+ }
+}
+
+static void
+message_queue_put(struct message_queue *q, struct message *msg)
+{
+ pthread_mutex_lock(&q->lock);
+ list_add_tail(&msg->list, &q->list);
+ pthread_cond_signal(&q->msg_avail_cond);
+ pthread_mutex_unlock(&q->lock);
+}
+
+static struct message *
+message_queue_get(struct message_queue *q)
+{
+ struct message *msg;
+
+ pthread_mutex_lock(&q->lock);
+ while (list_empty(&q->list) && !q->terminating)
+ pthread_cond_wait(&q->msg_avail_cond, &q->lock);
+ if (!q->terminating) {
+ msg = list_entry(q->list.next, struct message, list);
+ list_del(&msg->list);
+ } else
+ msg = NULL;
+ pthread_mutex_unlock(&q->lock);
+ return msg;
+}
+
+static void
+message_queue_terminate(struct message_queue *q)
+{
+ pthread_mutex_lock(&q->lock);
+ q->terminating = true;
+ pthread_cond_broadcast(&q->msg_avail_cond);
+ pthread_mutex_unlock(&q->lock);
+}
+
+static int
+init_message(struct message *msg, size_t num_chunks, u32 out_chunk_size)
+{
+ msg->num_alloc_chunks = num_chunks;
+ for (size_t i = 0; i < num_chunks; i++) {
+ msg->compressed_chunks[i] = MALLOC(out_chunk_size - 1);
+ msg->uncompressed_chunks[i] = MALLOC(out_chunk_size);
+ if (msg->compressed_chunks[i] == NULL ||
+ msg->uncompressed_chunks[i] == NULL)
+ return WIMLIB_ERR_NOMEM;
+ }
+ return 0;
+}
+
+static void
+destroy_message(struct message *msg)
+{
+ for (size_t i = 0; i < msg->num_alloc_chunks; i++) {
+ FREE(msg->compressed_chunks[i]);
+ FREE(msg->uncompressed_chunks[i]);
+ }
+}
+
+static void
+free_messages(struct message *msgs, size_t num_messages)
+{
+ if (msgs) {
+ for (size_t i = 0; i < num_messages; i++)
+ destroy_message(&msgs[i]);
+ FREE(msgs);
+ }
+}
+
+static struct message *
+allocate_messages(size_t count, size_t chunks_per_msg, u32 out_chunk_size)
+{
+ struct message *msgs;
+
+ msgs = CALLOC(count, sizeof(struct message));
+ if (msgs == NULL)
+ return NULL;
+ for (size_t i = 0; i < count; i++) {
+ if (init_message(&msgs[i], chunks_per_msg, out_chunk_size)) {
+ free_messages(msgs, count);
+ return NULL;
+ }
+ }
+ return msgs;
+}
+
+static void
+compress_chunks(struct message *msg, int out_ctype,
+ struct wimlib_lzx_context *comp_ctx)
+{
+
+ for (size_t i = 0; i < msg->num_filled_chunks; i++) {
+ msg->compressed_chunk_sizes[i] =
+ compress_chunk(msg->uncompressed_chunks[i],
+ msg->uncompressed_chunk_sizes[i],
+ msg->compressed_chunks[i],
+ out_ctype,
+ comp_ctx);
+ }
+}
+
+static void *
+compressor_thread_proc(void *arg)
+{
+ struct compressor_thread_data *params = arg;
+ struct message *msg;
+
+ while ((msg = message_queue_get(params->chunks_to_compress_queue)) != NULL) {
+ compress_chunks(msg, params->out_ctype, params->comp_ctx);
+ message_queue_put(params->compressed_chunks_queue, msg);
+ }
+ return NULL;
+}
+
+static void
+parallel_chunk_compressor_destroy(struct chunk_compressor *_ctx)
+{
+ struct parallel_chunk_compressor *ctx = (struct parallel_chunk_compressor *)_ctx;
+ unsigned i;
+
+ if (ctx == NULL)
+ return;
+
+ if (ctx->num_started_threads != 0) {
+ DEBUG("Terminating %u compressor threads", ctx->num_started_threads);
+ message_queue_terminate(&ctx->chunks_to_compress_queue);
+
+ for (i = 0; i < ctx->num_started_threads; i++)
+ pthread_join(ctx->thread_data[i].thread, NULL);
+ }
+
+ message_queue_destroy(&ctx->chunks_to_compress_queue);
+ message_queue_destroy(&ctx->compressed_chunks_queue);
+
+ if (ctx->base.out_ctype == WIMLIB_COMPRESSION_TYPE_LZX &&
+ ctx->thread_data != NULL)
+ for (i = 0; i < ctx->num_threads; i++)
+ wimlib_lzx_free_context(ctx->thread_data[i].comp_ctx);
+
+ FREE(ctx->thread_data);
+
+ free_messages(ctx->msgs, ctx->num_messages);
+
+ FREE(ctx);
+}
+
+static void
+submit_compression_msg(struct parallel_chunk_compressor *ctx)
+{
+ struct message *msg = ctx->next_submit_msg;
+
+ msg->complete = false;
+ list_add_tail(&msg->submission_list, &ctx->submitted_msgs);
+ message_queue_put(&ctx->chunks_to_compress_queue, msg);
+ ctx->next_submit_msg = NULL;
+}
+
+static bool
+parallel_chunk_compressor_submit_chunk(struct chunk_compressor *_ctx,
+ const void *chunk, size_t size)
+{
+ struct parallel_chunk_compressor *ctx = (struct parallel_chunk_compressor *)_ctx;
+ struct message *msg;
+
+ wimlib_assert(size > 0);
+ wimlib_assert(size <= ctx->base.out_chunk_size);
+
+ if (ctx->next_submit_msg) {
+ msg = ctx->next_submit_msg;
+ } else {
+ if (list_empty(&ctx->available_msgs))
+ return false;
+
+ msg = list_entry(ctx->available_msgs.next, struct message, list);
+ list_del(&msg->list);
+ ctx->next_submit_msg = msg;
+ msg->num_filled_chunks = 0;
+ }
+
+ memcpy(msg->uncompressed_chunks[msg->num_filled_chunks], chunk, size);
+ msg->uncompressed_chunk_sizes[msg->num_filled_chunks] = size;
+ if (++msg->num_filled_chunks == msg->num_alloc_chunks)
+ submit_compression_msg(ctx);
+ return true;
+}
+
+static bool
+parallel_chunk_compressor_get_chunk(struct chunk_compressor *_ctx,
+ const void **cdata_ret, unsigned *csize_ret,
+ unsigned *usize_ret)
+{
+ struct parallel_chunk_compressor *ctx = (struct parallel_chunk_compressor *)_ctx;
+ struct message *msg;
+
+
+ if (ctx->next_submit_msg)
+ submit_compression_msg(ctx);
+
+ if (ctx->next_ready_msg) {
+ msg = ctx->next_ready_msg;
+ } else {
+ if (list_empty(&ctx->submitted_msgs))
+ return false;
+
+ while (!(msg = list_entry(ctx->submitted_msgs.next,
+ struct message,
+ submission_list))->complete)
+ message_queue_get(&ctx->compressed_chunks_queue)->complete = true;
+
+ ctx->next_ready_msg = msg;
+ ctx->next_chunk_idx = 0;
+ }
+
+ if (msg->compressed_chunk_sizes[ctx->next_chunk_idx]) {
+ *cdata_ret = msg->compressed_chunks[ctx->next_chunk_idx];
+ *csize_ret = msg->compressed_chunk_sizes[ctx->next_chunk_idx];
+ } else {
+ *cdata_ret = msg->uncompressed_chunks[ctx->next_chunk_idx];
+ *csize_ret = msg->uncompressed_chunk_sizes[ctx->next_chunk_idx];
+ }
+ *usize_ret = msg->uncompressed_chunk_sizes[ctx->next_chunk_idx];
+
+ if (++ctx->next_chunk_idx == msg->num_filled_chunks) {
+ list_del(&msg->submission_list);
+ list_add_tail(&msg->list, &ctx->available_msgs);
+ ctx->next_ready_msg = NULL;
+ }
+ return true;
+}
+
+int
+new_parallel_chunk_compressor(int out_ctype, u32 out_chunk_size,
+ unsigned num_threads, u64 max_memory,
+ struct chunk_compressor **compressor_ret)
+{
+ u64 approx_mem_required;
+ size_t chunks_per_msg;
+ size_t msgs_per_thread;
+ struct parallel_chunk_compressor *ctx;
+ unsigned i;
+ int ret;
+ unsigned desired_num_threads;
+
+ wimlib_assert(out_chunk_size > 0);
+ wimlib_assert(out_ctype != WIMLIB_COMPRESSION_TYPE_NONE);
+
+ if (num_threads == 0)
+ num_threads = get_default_num_threads();
+
+ if (num_threads == 1) {
+ DEBUG("Only 1 thread; Not bothering with "
+ "parallel chunk compressor.");
+ return -1;
+ }
+
+ if (max_memory == 0)
+ max_memory = get_avail_memory();
+
+ desired_num_threads = num_threads;
+
+ chunks_per_msg = MAX_CHUNKS_PER_MSG;
+ msgs_per_thread = 2;
+ for (;;) {
+ approx_mem_required =
+ (u64)chunks_per_msg *
+ (u64)msgs_per_thread *
+ (u64)num_threads *
+ (u64)out_chunk_size
+ + 1000000
+ + (out_chunk_size * num_threads * 4);
+ if (approx_mem_required <= max_memory)
+ break;
+
+ if (chunks_per_msg > 1)
+ chunks_per_msg--;
+ else if (msgs_per_thread > 1)
+ msgs_per_thread--;
+ else if (num_threads > 1)
+ num_threads--;
+ else
+ break;
+ }
+
+ if (num_threads < desired_num_threads) {
+ WARNING("Wanted to use %u threads, but limiting to %u "
+ "to fit in available memory!",
+ desired_num_threads, num_threads);
+ }
+
+ if (num_threads == 1) {
+ DEBUG("Only 1 thread; Not bothering with "
+ "parallel chunk compressor.");
+ return -2;
+ }
+
+ ret = WIMLIB_ERR_NOMEM;
+ ctx = CALLOC(1, sizeof(*ctx));
+ if (ctx == NULL)
+ goto err;
+
+ ctx->base.out_ctype = out_ctype;
+ ctx->base.out_chunk_size = out_chunk_size;
+ ctx->base.num_threads = num_threads;
+ ctx->base.destroy = parallel_chunk_compressor_destroy;
+ ctx->base.submit_chunk = parallel_chunk_compressor_submit_chunk;
+ ctx->base.get_chunk = parallel_chunk_compressor_get_chunk;
+
+ ctx->num_threads = num_threads;
+
+ ret = message_queue_init(&ctx->chunks_to_compress_queue);
+ if (ret)
+ goto err;
+
+ ret = message_queue_init(&ctx->compressed_chunks_queue);
+ if (ret)
+ goto err;
+
+ ret = WIMLIB_ERR_NOMEM;
+ ctx->thread_data = CALLOC(num_threads, sizeof(ctx->thread_data[0]));
+ if (ctx->thread_data == NULL)
+ goto err;
+
+ for (i = 0; i < num_threads; i++) {
+ struct compressor_thread_data *dat;
+
+ dat = &ctx->thread_data[i];
+
+ dat->chunks_to_compress_queue = &ctx->chunks_to_compress_queue;
+ dat->compressed_chunks_queue = &ctx->compressed_chunks_queue;
+ dat->out_ctype = out_ctype;
+ dat->out_chunk_size = out_chunk_size;
+ if (out_ctype == WIMLIB_COMPRESSION_TYPE_LZX) {
+ ret = wimlib_lzx_alloc_context(out_chunk_size, NULL,
+ &dat->comp_ctx);
+ if (ret)
+ goto err;
+ }
+ }
+
+ for (ctx->num_started_threads = 0;
+ ctx->num_started_threads < num_threads;
+ ctx->num_started_threads++)
+ {
+ DEBUG("pthread_create thread %u of %u",
+ ctx->num_started_threads + 1, num_threads);
+ ret = pthread_create(&ctx->thread_data[ctx->num_started_threads].thread,
+ NULL,
+ compressor_thread_proc,
+ &ctx->thread_data[ctx->num_started_threads]);
+ if (ret) {
+ errno = ret;
+ ret = WIMLIB_ERR_NOMEM;
+ WARNING_WITH_ERRNO("Failed to create compressor thread %u of %u");
+ goto err;
+ }
+ }
+
+ ret = WIMLIB_ERR_NOMEM;
+ ctx->num_messages = num_threads * msgs_per_thread;
+ ctx->msgs = allocate_messages(ctx->num_messages,
+ chunks_per_msg, out_chunk_size);
+ if (ctx->msgs == NULL)
+ goto err;
+
+ INIT_LIST_HEAD(&ctx->available_msgs);
+ for (size_t i = 0; i < ctx->num_messages; i++)
+ list_add_tail(&ctx->msgs[i].list, &ctx->available_msgs);
+
+ INIT_LIST_HEAD(&ctx->submitted_msgs);
+
+ *compressor_ret = &ctx->base;
+ return 0;
+
+err:
+ parallel_chunk_compressor_destroy(&ctx->base);
+ return ret;
+}
--- /dev/null
+/*
+ * compress_serial.c
+ *
+ * Compress chunks of data (serial version).
+ */
+
+/*
+ * Copyright (C) 2013 Eric Biggers
+ *
+ * This file is part of wimlib, a library for working with WIM files.
+ *
+ * wimlib 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.
+ *
+ * wimlib 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
+ * wimlib; if not, see http://www.gnu.org/licenses/.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "wimlib.h"
+#include "wimlib/assert.h"
+#include "wimlib/compress_chunks.h"
+#include "wimlib/util.h"
+
+#include <string.h>
+
+struct serial_chunk_compressor {
+ struct chunk_compressor base;
+ struct wimlib_lzx_context *comp_ctx;
+ u8 *udata;
+ u8 *cdata;
+ unsigned ulen;
+ unsigned clen;
+};
+
+static void
+serial_chunk_compressor_destroy(struct chunk_compressor *_ctx)
+{
+ struct serial_chunk_compressor *ctx = (struct serial_chunk_compressor*)_ctx;
+
+ if (ctx == NULL)
+ return;
+
+ FREE(ctx->udata);
+ FREE(ctx->cdata);
+ FREE(ctx);
+}
+
+static bool
+serial_chunk_compressor_submit_chunk(struct chunk_compressor *_ctx,
+ const void *chunk, size_t size)
+{
+ struct serial_chunk_compressor *ctx = (struct serial_chunk_compressor*)_ctx;
+
+ if (ctx->ulen != 0)
+ return false;
+
+ wimlib_assert(size > 0);
+ wimlib_assert(size <= ctx->base.out_chunk_size);
+
+ memcpy(ctx->udata, chunk, size);
+ ctx->ulen = size;
+ return true;
+}
+
+static bool
+serial_chunk_compressor_get_chunk(struct chunk_compressor *_ctx,
+ const void **cdata_ret, unsigned *csize_ret,
+ unsigned *usize_ret)
+{
+ struct serial_chunk_compressor *ctx = (struct serial_chunk_compressor*)_ctx;
+
+ if (ctx->ulen == 0)
+ return false;
+
+ ctx->clen = compress_chunk(ctx->udata, ctx->ulen,
+ ctx->cdata, ctx->base.out_ctype,
+ ctx->comp_ctx);
+
+ if (ctx->clen) {
+ *cdata_ret = ctx->cdata;
+ *csize_ret = ctx->clen;
+ } else {
+ *cdata_ret = ctx->udata;
+ *csize_ret = ctx->ulen;
+ }
+ *usize_ret = ctx->ulen;
+
+ ctx->ulen = 0;
+ return true;
+}
+
+int
+new_serial_chunk_compressor(int out_ctype, u32 out_chunk_size,
+ struct wimlib_lzx_context *comp_ctx,
+ struct chunk_compressor **compressor_ret)
+{
+ struct serial_chunk_compressor *ctx;
+
+ ctx = CALLOC(1, sizeof(*ctx));
+ if (ctx == NULL)
+ goto err;
+
+ ctx->base.out_ctype = out_ctype;
+ ctx->base.out_chunk_size = out_chunk_size;
+ ctx->base.num_threads = 1;
+ ctx->base.destroy = serial_chunk_compressor_destroy;
+ ctx->base.submit_chunk = serial_chunk_compressor_submit_chunk;
+ ctx->base.get_chunk = serial_chunk_compressor_get_chunk;
+
+ ctx->comp_ctx = comp_ctx;
+ ctx->udata = MALLOC(out_chunk_size);
+ ctx->cdata = MALLOC(out_chunk_size - 1);
+ ctx->ulen = 0;
+ if (ctx->udata == NULL || ctx->cdata == NULL)
+ goto err;
+
+ *compressor_ret = &ctx->base;
+ return 0;
+
+err:
+ serial_chunk_compressor_destroy(&ctx->base);
+ return WIMLIB_ERR_NOMEM;
+}
git://wimlib.net / wimlib / commitdiff