]> wimlib.net Git - wimlib/blobdiff - src/wim.c
Serialize wimlib_global_init() and wimlib_global_cleanup()
[wimlib] / src / wim.c
index fc15a21db00c6a541091e770a29ca7eef8863260..a66d5cce1c16462670515398af70de3fd4993df3 100644 (file)
--- a/src/wim.c
+++ b/src/wim.c
@@ -1,36 +1,45 @@
 /*
- * wim.c - Stuff that doesn't fit into any other file
+ * wim.c - High-level code dealing with WIMStructs and images.
  */
 
 /*
- * Copyright (C) 2012, 2013 Eric Biggers
+ * Copyright (C) 2012, 2013, 2014 Eric Biggers
  *
- * This file is part of wimlib, a library for working with WIM files.
+ * This file is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser 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 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
+ * This file 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 Lesser 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/.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this file; if not, see http://www.gnu.org/licenses/.
  */
 
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
 
-#include "wimlib/error.h"
+#include <errno.h>
+#include <fcntl.h>
+#ifndef __WIN32__
+#  include <langinfo.h>
+#endif
+#include <pthread.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "wimlib.h"
+#include "wimlib/assert.h"
+#include "wimlib/blob_table.h"
+#include "wimlib/bitops.h"
 #include "wimlib/dentry.h"
 #include "wimlib/encoding.h"
 #include "wimlib/file_io.h"
 #include "wimlib/integrity.h"
-#include "wimlib/lookup_table.h"
 #include "wimlib/metadata.h"
 #ifdef WITH_NTFS_3G
 #  include "wimlib/ntfs_3g.h" /* for do_ntfs_umount() */
 #include "wimlib/security.h"
 #include "wimlib/wim.h"
 #include "wimlib/xml.h"
-#include "wimlib/compressor_ops.h"
-#include "wimlib/decompressor_ops.h"
-#include "wimlib/version.h"
-
 #ifdef __WIN32__
 #  include "wimlib/win32.h" /* for realpath() replacement */
 #endif
 
-#include <errno.h>
-#include <fcntl.h>
-#ifndef __WIN32__
-#  include <langinfo.h>
-#endif
-#include <limits.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <unistd.h>
-
 static int
-wim_default_pack_compression_type(void)
+wim_default_solid_compression_type(void)
 {
        return WIMLIB_COMPRESSION_TYPE_LZMS;
 }
 
 static u32
-wim_default_pack_chunk_size(int ctype) {
+wim_default_solid_chunk_size(int ctype) {
        switch (ctype) {
        case WIMLIB_COMPRESSION_TYPE_LZMS:
-               return 1U << 26; /* 67108864  */
+               return (u32)1 << 26; /* 67108864  */
        default:
-               return 1U << 15; /* 32768     */
+               return (u32)1 << 15; /* 32768     */
        }
 }
 
@@ -76,14 +71,15 @@ static WIMStruct *
 new_wim_struct(void)
 {
        WIMStruct *wim = CALLOC(1, sizeof(WIMStruct));
-       if (wim) {
-               filedes_invalidate(&wim->in_fd);
-               filedes_invalidate(&wim->out_fd);
-               wim->out_pack_compression_type = wim_default_pack_compression_type();
-               wim->out_pack_chunk_size = wim_default_pack_chunk_size(
-                                               wim->out_pack_compression_type);
-               INIT_LIST_HEAD(&wim->subwims);
-       }
+       if (!wim)
+               return NULL;
+
+       filedes_invalidate(&wim->in_fd);
+       filedes_invalidate(&wim->out_fd);
+       wim->out_solid_compression_type = wim_default_solid_compression_type();
+       wim->out_solid_chunk_size = wim_default_solid_chunk_size(
+                                       wim->out_solid_compression_type);
+       INIT_LIST_HEAD(&wim->subwims);
        return wim;
 }
 
@@ -101,7 +97,7 @@ wim_chunk_size_valid(u32 chunk_size, int ctype)
        /* Chunk size must be power of 2.  */
        if (chunk_size == 0)
                return false;
-       order = bsr32(chunk_size);
+       order = fls32(chunk_size);
        if (chunk_size != 1U << order)
                return false;
 
@@ -126,9 +122,8 @@ wim_chunk_size_valid(u32 chunk_size, int ctype)
        switch (ctype) {
        case WIMLIB_COMPRESSION_TYPE_LZX:
                return order >= 15 && order <= 21;
-
        case WIMLIB_COMPRESSION_TYPE_XPRESS:
-               return order >= 12 && order <= 26;
+               return order >= 12 && order <= 16;
        case WIMLIB_COMPRESSION_TYPE_LZMS:
                return order >= 15 && order <= 30;
        }
@@ -149,6 +144,19 @@ wim_default_chunk_size(int ctype)
        }
 }
 
+static int
+is_blob_in_solid_resource(struct blob_descriptor *blob, void *_ignore)
+{
+       return blob->blob_location == BLOB_IN_WIM &&
+               (blob->rdesc->flags & WIM_RESHDR_FLAG_SOLID);
+}
+
+bool
+wim_has_solid_resources(const WIMStruct *wim)
+{
+       return for_blob_in_table(wim->blob_table, is_blob_in_solid_resource, NULL);
+}
+
 /*
  * Calls a function on images in the WIM.  If @image is WIMLIB_ALL_IMAGES,
  * @visitor is called on the WIM once for each image, with each image selected
@@ -188,61 +196,57 @@ WIMLIBAPI int
 wimlib_create_new_wim(int ctype, WIMStruct **wim_ret)
 {
        WIMStruct *wim;
-       struct wim_lookup_table *table;
        int ret;
 
-       wimlib_global_init(WIMLIB_INIT_FLAG_ASSUME_UTF8);
-
-       DEBUG("Creating new WIM with %"TS" compression.",
-             wimlib_get_compression_type_string(ctype));
+       ret = wimlib_global_init(WIMLIB_INIT_FLAG_ASSUME_UTF8);
+       if (ret)
+               return ret;
 
-       /* Allocate the WIMStruct. */
        wim = new_wim_struct();
-       if (wim == NULL)
+       if (!wim)
                return WIMLIB_ERR_NOMEM;
 
        ret = init_wim_header(&wim->hdr, ctype, wim_default_chunk_size(ctype));
        if (ret)
-               goto out_free;
+               goto out_free_wim;
 
-       table = new_lookup_table(9001);
-       if (table == NULL) {
+       wim->blob_table = new_blob_table(9001);
+       if (!wim->blob_table) {
                ret = WIMLIB_ERR_NOMEM;
-               goto out_free;
+               goto out_free_wim;
        }
-       wim->lookup_table = table;
-       wim->refcnts_ok = 1;
        wim->compression_type = ctype;
        wim->out_compression_type = ctype;
        wim->chunk_size = wim->hdr.chunk_size;
        wim->out_chunk_size = wim->hdr.chunk_size;
        *wim_ret = wim;
        return 0;
-out_free:
+
+out_free_wim:
        FREE(wim);
        return ret;
 }
 
 static void
 destroy_image_metadata(struct wim_image_metadata *imd,
-                      struct wim_lookup_table *table,
-                      bool free_metadata_lte)
+                      struct blob_table *table,
+                      bool free_metadata_blob_descriptor)
 {
        free_dentry_tree(imd->root_dentry, table);
        imd->root_dentry = NULL;
        free_wim_security_data(imd->security_data);
        imd->security_data = NULL;
 
-       if (free_metadata_lte) {
-               free_lookup_table_entry(imd->metadata_lte);
-               imd->metadata_lte = NULL;
+       if (free_metadata_blob_descriptor) {
+               free_blob_descriptor(imd->metadata_blob);
+               imd->metadata_blob = NULL;
        }
-       if (table == NULL) {
-               struct wim_lookup_table_entry *lte, *tmp;
-               list_for_each_entry_safe(lte, tmp, &imd->unhashed_streams, unhashed_list)
-                       free_lookup_table_entry(lte);
+       if (!table) {
+               struct blob_descriptor *blob, *tmp;
+               list_for_each_entry_safe(blob, tmp, &imd->unhashed_blobs, unhashed_list)
+                       free_blob_descriptor(blob);
        }
-       INIT_LIST_HEAD(&imd->unhashed_streams);
+       INIT_LIST_HEAD(&imd->unhashed_blobs);
        INIT_LIST_HEAD(&imd->inode_list);
 #ifdef WITH_NTFS_3G
        if (imd->ntfs_vol) {
@@ -253,8 +257,7 @@ destroy_image_metadata(struct wim_image_metadata *imd,
 }
 
 void
-put_image_metadata(struct wim_image_metadata *imd,
-                  struct wim_lookup_table *table)
+put_image_metadata(struct wim_image_metadata *imd, struct blob_table *table)
 {
        if (imd && --imd->refcnt == 0) {
                destroy_image_metadata(imd, table, true);
@@ -269,12 +272,10 @@ append_image_metadata(WIMStruct *wim, struct wim_image_metadata *imd)
 {
        struct wim_image_metadata **imd_array;
 
-       DEBUG("Reallocating image metadata array for image_count = %u",
-             wim->hdr.image_count + 1);
        imd_array = REALLOC(wim->image_metadata,
                            sizeof(wim->image_metadata[0]) * (wim->hdr.image_count + 1));
 
-       if (imd_array == NULL)
+       if (!imd_array)
                return WIMLIB_ERR_NOMEM;
        wim->image_metadata = imd_array;
        imd_array[wim->hdr.image_count++] = imd;
@@ -290,10 +291,7 @@ new_image_metadata(void)
        if (imd) {
                imd->refcnt = 1;
                INIT_LIST_HEAD(&imd->inode_list);
-               INIT_LIST_HEAD(&imd->unhashed_streams);
-               DEBUG("Created new image metadata (refcnt=1)");
-       } else {
-               ERROR_WITH_ERRNO("Failed to allocate new image metadata structure");
+               INIT_LIST_HEAD(&imd->unhashed_blobs);
        }
        return imd;
 }
@@ -303,19 +301,13 @@ new_image_metadata_array(unsigned num_images)
 {
        struct wim_image_metadata **imd_array;
 
-       DEBUG("Creating new image metadata array for %u images",
-             num_images);
-
        imd_array = CALLOC(num_images, sizeof(imd_array[0]));
 
-       if (imd_array == NULL) {
-               ERROR("Failed to allocate memory for %u image metadata structures",
-                     num_images);
+       if (!imd_array)
                return NULL;
-       }
        for (unsigned i = 0; i < num_images; i++) {
                imd_array[i] = new_image_metadata();
-               if (imd_array[i] == NULL) {
+               if (unlikely(!imd_array[i])) {
                        for (unsigned j = 0; j < i; j++)
                                put_image_metadata(imd_array[j], NULL);
                        FREE(imd_array);
@@ -348,67 +340,62 @@ select_wim_image(WIMStruct *wim, int image)
        struct wim_image_metadata *imd;
        int ret;
 
-       DEBUG("Selecting image %d", image);
-
-       if (image == WIMLIB_NO_IMAGE) {
-               ERROR("Invalid image: %d", WIMLIB_NO_IMAGE);
+       if (image == WIMLIB_NO_IMAGE)
                return WIMLIB_ERR_INVALID_IMAGE;
-       }
 
        if (image == wim->current_image)
                return 0;
 
-       if (image < 1 || image > wim->hdr.image_count) {
-               ERROR("Cannot select image %d: There are only %u images",
-                     image, wim->hdr.image_count);
+       if (image < 1 || image > wim->hdr.image_count)
                return WIMLIB_ERR_INVALID_IMAGE;
-       }
 
-       if (!wim_has_metadata(wim)) {
-               ERROR("\"%"TS"\" does not contain metadata resources!", wim->filename);
-               if (wim->hdr.part_number != 1)
-                       ERROR("Specify the first part of the split WIM instead.");
+       if (!wim_has_metadata(wim))
                return WIMLIB_ERR_METADATA_NOT_FOUND;
-       }
 
        /* If a valid image is currently selected, its metadata can be freed if
         * it has not been modified.  */
-       if (wim->current_image != WIMLIB_NO_IMAGE) {
-               imd = wim_get_current_image_metadata(wim);
-               if (!imd->modified) {
-                       wimlib_assert(list_empty(&imd->unhashed_streams));
-                       DEBUG("Freeing image %u", wim->current_image);
-                       destroy_image_metadata(imd, NULL, false);
-               }
-       }
+       deselect_current_wim_image(wim);
        wim->current_image = image;
        imd = wim_get_current_image_metadata(wim);
        if (imd->root_dentry || imd->modified) {
                ret = 0;
        } else {
-               ret = read_metadata_resource(wim, imd);
+               ret = read_metadata_resource(imd);
                if (ret)
                        wim->current_image = WIMLIB_NO_IMAGE;
        }
        return ret;
 }
 
+void
+deselect_current_wim_image(WIMStruct *wim)
+{
+       struct wim_image_metadata *imd;
+       if (wim->current_image == WIMLIB_NO_IMAGE)
+               return;
+       imd = wim_get_current_image_metadata(wim);
+       if (!imd->modified) {
+               wimlib_assert(list_empty(&imd->unhashed_blobs));
+               destroy_image_metadata(imd, NULL, false);
+       }
+       wim->current_image = WIMLIB_NO_IMAGE;
+}
 
 /* API function documented in wimlib.h  */
 WIMLIBAPI const tchar *
 wimlib_get_compression_type_string(int ctype)
 {
        switch (ctype) {
-               case WIMLIB_COMPRESSION_TYPE_NONE:
-                       return T("None");
-               case WIMLIB_COMPRESSION_TYPE_LZX:
-                       return T("LZX");
-               case WIMLIB_COMPRESSION_TYPE_XPRESS:
-                       return T("XPRESS");
-               case WIMLIB_COMPRESSION_TYPE_LZMS:
-                       return T("LZMS");
-               default:
-                       return T("Invalid");
+       case WIMLIB_COMPRESSION_TYPE_NONE:
+               return T("None");
+       case WIMLIB_COMPRESSION_TYPE_XPRESS:
+               return T("XPRESS");
+       case WIMLIB_COMPRESSION_TYPE_LZX:
+               return T("LZX");
+       case WIMLIB_COMPRESSION_TYPE_LZMS:
+               return T("LZMS");
+       default:
+               return T("Invalid");
        }
 }
 
@@ -502,14 +489,16 @@ wimlib_get_wim_info(WIMStruct *wim, struct wimlib_wim_info *info)
 WIMLIBAPI int
 wimlib_set_wim_info(WIMStruct *wim, const struct wimlib_wim_info *info, int which)
 {
-       int ret;
-
        if (which & ~(WIMLIB_CHANGE_READONLY_FLAG |
                      WIMLIB_CHANGE_GUID |
                      WIMLIB_CHANGE_BOOT_INDEX |
                      WIMLIB_CHANGE_RPFIX_FLAG))
                return WIMLIB_ERR_INVALID_PARAM;
 
+       if ((which & WIMLIB_CHANGE_BOOT_INDEX) &&
+           info->boot_index > wim->hdr.image_count)
+               return WIMLIB_ERR_INVALID_IMAGE;
+
        if (which & WIMLIB_CHANGE_READONLY_FLAG) {
                if (info->is_marked_readonly)
                        wim->hdr.flags |= WIM_HDR_FLAG_READONLY;
@@ -517,24 +506,11 @@ wimlib_set_wim_info(WIMStruct *wim, const struct wimlib_wim_info *info, int whic
                        wim->hdr.flags &= ~WIM_HDR_FLAG_READONLY;
        }
 
-       if ((which & ~WIMLIB_CHANGE_READONLY_FLAG) == 0)
-               return 0;
-
-       ret = can_modify_wim(wim);
-       if (ret)
-               return ret;
-
        if (which & WIMLIB_CHANGE_GUID)
                memcpy(wim->hdr.guid, info->guid, WIM_GUID_LEN);
 
-       if (which & WIMLIB_CHANGE_BOOT_INDEX) {
-               if (info->boot_index > wim->hdr.image_count) {
-                       ERROR("%u is not 0 or a valid image in the WIM to mark as bootable",
-                             info->boot_index);
-                       return WIMLIB_ERR_INVALID_IMAGE;
-               }
+       if (which & WIMLIB_CHANGE_BOOT_INDEX)
                wim->hdr.boot_idx = info->boot_index;
-       }
 
        if (which & WIMLIB_CHANGE_RPFIX_FLAG) {
                if (info->has_rpfix)
@@ -577,26 +553,21 @@ wimlib_set_output_compression_type(WIMStruct *wim, int ctype)
 WIMLIBAPI int
 wimlib_set_output_pack_compression_type(WIMStruct *wim, int ctype)
 {
-       int ret = set_out_ctype(ctype, &wim->out_pack_compression_type);
+       int ret = set_out_ctype(ctype, &wim->out_solid_compression_type);
        if (ret)
                return ret;
 
        /* Reset the chunk size if it's no longer valid.  */
-       if (!wim_chunk_size_valid(wim->out_pack_chunk_size, ctype))
-               wim->out_pack_chunk_size = wim_default_pack_chunk_size(ctype);
+       if (!wim_chunk_size_valid(wim->out_solid_chunk_size, ctype))
+               wim->out_solid_chunk_size = wim_default_solid_chunk_size(ctype);
        return 0;
 }
 
 static int
 set_out_chunk_size(u32 chunk_size, int ctype, u32 *out_chunk_size_p)
 {
-       if (!wim_chunk_size_valid(chunk_size, ctype)) {
-               ERROR("Invalid chunk size (%"PRIu32" bytes) "
-                     "for compression type %"TS"!",
-                     chunk_size,
-                     wimlib_get_compression_type_string(ctype));
+       if (!wim_chunk_size_valid(chunk_size, ctype))
                return WIMLIB_ERR_INVALID_CHUNK_SIZE;
-       }
 
        *out_chunk_size_p = chunk_size;
        return 0;
@@ -622,14 +593,14 @@ WIMLIBAPI int
 wimlib_set_output_pack_chunk_size(WIMStruct *wim, uint32_t chunk_size)
 {
        if (chunk_size == 0) {
-               wim->out_pack_chunk_size =
-                       wim_default_pack_chunk_size(wim->out_pack_compression_type);
+               wim->out_solid_chunk_size =
+                       wim_default_solid_chunk_size(wim->out_solid_compression_type);
                return 0;
        }
 
        return set_out_chunk_size(chunk_size,
-                                 wim->out_pack_compression_type,
-                                 &wim->out_pack_chunk_size);
+                                 wim->out_solid_compression_type,
+                                 &wim->out_solid_chunk_size);
 }
 
 WIMLIBAPI void
@@ -657,7 +628,7 @@ open_wim_file(const tchar *filename, struct filedes *fd_ret)
 
 /*
  * Begins the reading of a WIM file; opens the file and reads its header and
- * lookup table, and optionally checks the integrity.
+ * blob table, and optionally checks the integrity.
  */
 static int
 begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
@@ -689,12 +660,13 @@ begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
                 * replacement function in win32_replacements.c.
                 */
                wim->filename = realpath(wimfile, NULL);
-               if (wim->filename == NULL) {
-                       ERROR_WITH_ERRNO("Failed to resolve WIM filename");
+               if (!wim->filename) {
+                       ERROR_WITH_ERRNO("Failed to get full path to file "
+                                        "\"%"TS"\"", wimfile);
                        if (errno == ENOMEM)
                                return WIMLIB_ERR_NOMEM;
                        else
-                               return WIMLIB_ERR_OPEN;
+                               return WIMLIB_ERR_NO_FILENAME;
                }
        }
 
@@ -719,13 +691,9 @@ begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
            (wim->hdr.total_parts != 1))
                return WIMLIB_ERR_IS_SPLIT_WIM;
 
-       DEBUG("According to header, WIM contains %u images", wim->hdr.image_count);
-
        /* If the boot index is invalid, print a warning and set it to 0 */
        if (wim->hdr.boot_idx > wim->hdr.image_count) {
-               WARNING("In `%"TS"', image %u is marked as bootable, "
-                       "but there are only %u images in the WIM",
-                       wimfile, wim->hdr.boot_idx, wim->hdr.image_count);
+               WARNING("Ignoring invalid boot index.");
                wim->hdr.boot_idx = 0;
        }
 
@@ -739,9 +707,6 @@ begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
                } else if (wim->hdr.flags & WIM_HDR_FLAG_COMPRESS_LZMS) {
                        wim->compression_type = WIMLIB_COMPRESSION_TYPE_LZMS;
                } else {
-                       ERROR("The compression flag is set on \"%"TS"\", but "
-                             "a flag for a recognized format is not",
-                             wimfile);
                        return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
                }
        } else {
@@ -754,8 +719,7 @@ begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
        wim->out_chunk_size = wim->chunk_size;
        if (!wim_chunk_size_valid(wim->chunk_size, wim->compression_type)) {
                ERROR("Invalid chunk size (%"PRIu32" bytes) "
-                     "for compression type %"TS"!",
-                     wim->chunk_size,
+                     "for compression type %"TS"!", wim->chunk_size,
                      wimlib_get_compression_type_string(wim->compression_type));
                return WIMLIB_ERR_INVALID_CHUNK_SIZE;
        }
@@ -763,10 +727,10 @@ begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
        if (open_flags & WIMLIB_OPEN_FLAG_CHECK_INTEGRITY) {
                ret = check_wim_integrity(wim);
                if (ret == WIM_INTEGRITY_NONEXISTENT) {
-                       WARNING("No integrity information for `%"TS"'; skipping "
-                               "integrity check.", wimfile);
+                       WARNING("\"%"TS"\" does not contain integrity "
+                               "information.  Skipping integrity check.",
+                               wimfile);
                } else if (ret == WIM_INTEGRITY_NOT_OK) {
-                       ERROR("WIM is not intact! (Failed integrity check)");
                        return WIMLIB_ERR_INTEGRITY;
                } else if (ret != WIM_INTEGRITY_OK) {
                        return ret;
@@ -775,13 +739,13 @@ begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
 
        if (wim->hdr.image_count != 0 && wim->hdr.part_number == 1) {
                wim->image_metadata = new_image_metadata_array(wim->hdr.image_count);
-               if (wim->image_metadata == NULL)
+               if (!wim->image_metadata)
                        return WIMLIB_ERR_NOMEM;
        }
 
        if (open_flags & WIMLIB_OPEN_FLAG_FROM_PIPE) {
-               wim->lookup_table = new_lookup_table(9001);
-               if (wim->lookup_table == NULL)
+               wim->blob_table = new_blob_table(9001);
+               if (!wim->blob_table)
                        return WIMLIB_ERR_NOMEM;
        } else {
 
@@ -791,18 +755,15 @@ begin_read(WIMStruct *wim, const void *wim_filename_or_fd, int open_flags)
 
                xml_num_images = wim_info_get_num_images(wim->wim_info);
                if (xml_num_images != wim->hdr.image_count) {
-                       ERROR("In the file `%"TS"', there are %u <IMAGE> elements "
-                             "in the XML data,", wimfile, xml_num_images);
-                       ERROR("but %u images in the WIM!  There must be exactly one "
-                             "<IMAGE> element per image.", wim->hdr.image_count);
+                       ERROR("The WIM's header is inconsistent with its XML data.\n"
+                             "        Please submit a bug report if you believe this "
+                             "WIM file should be considered valid.");
                        return WIMLIB_ERR_IMAGE_COUNT;
                }
 
-               ret = read_wim_lookup_table(wim);
+               ret = read_blob_table(wim);
                if (ret)
                        return ret;
-
-               DEBUG("Done beginning read of WIM file `%"TS"'.", wimfile);
        }
        return 0;
 }
@@ -815,18 +776,12 @@ open_wim_as_WIMStruct(const void *wim_filename_or_fd, int open_flags,
        WIMStruct *wim;
        int ret;
 
-       if (open_flags & WIMLIB_OPEN_FLAG_FROM_PIPE)
-               DEBUG("Opening pipable WIM from file descriptor %d.", *(const int*)wim_filename_or_fd);
-       else
-               DEBUG("Opening WIM file \"%"TS"\"", (const tchar*)wim_filename_or_fd);
-
-       wimlib_global_init(WIMLIB_INIT_FLAG_ASSUME_UTF8);
-
-       if (wim_ret == NULL)
-               return WIMLIB_ERR_INVALID_PARAM;
+       ret = wimlib_global_init(WIMLIB_INIT_FLAG_ASSUME_UTF8);
+       if (ret)
+               return ret;
 
        wim = new_wim_struct();
-       if (wim == NULL)
+       if (!wim)
                return WIMLIB_ERR_NOMEM;
 
        wim->progfunc = progfunc;
@@ -838,7 +793,6 @@ open_wim_as_WIMStruct(const void *wim_filename_or_fd, int open_flags,
                return ret;
        }
 
-       DEBUG("Successfully opened WIM and created WIMStruct.");
        *wim_ret = wim;
        return 0;
 }
@@ -854,6 +808,9 @@ wimlib_open_wim_with_progress(const tchar *wimfile, int open_flags,
                           WIMLIB_OPEN_FLAG_WRITE_ACCESS))
                return WIMLIB_ERR_INVALID_PARAM;
 
+       if (!wimfile || !*wimfile || !wim_ret)
+               return WIMLIB_ERR_INVALID_PARAM;
+
        return open_wim_as_WIMStruct(wimfile, open_flags, wim_ret,
                                     progfunc, progctx);
 }
@@ -866,27 +823,26 @@ wimlib_open_wim(const tchar *wimfile, int open_flags, WIMStruct **wim_ret)
                                             NULL, NULL);
 }
 
-/* Checksum all streams that are unhashed (other than the metadata streams),
- * merging them into the lookup table as needed.  This is a no-op unless the
- * library has previously used to add or mount an image using the same
- * WIMStruct. */
+/* Checksum all blobs that are unhashed (other than the metadata blobs), merging
+ * them into the blob table as needed.  This is a no-op unless files have been
+ * added to an image in the same WIMStruct.  */
 int
-wim_checksum_unhashed_streams(WIMStruct *wim)
+wim_checksum_unhashed_blobs(WIMStruct *wim)
 {
        int ret;
 
        if (!wim_has_metadata(wim))
                return 0;
        for (int i = 0; i < wim->hdr.image_count; i++) {
-               struct wim_lookup_table_entry *lte, *tmp;
+               struct blob_descriptor *blob, *tmp;
                struct wim_image_metadata *imd = wim->image_metadata[i];
-               image_for_each_unhashed_stream_safe(lte, tmp, imd) {
-                       struct wim_lookup_table_entry *new_lte;
-                       ret = hash_unhashed_stream(lte, wim->lookup_table, &new_lte);
+               image_for_each_unhashed_blob_safe(blob, tmp, imd) {
+                       struct blob_descriptor *new_blob;
+                       ret = hash_unhashed_blob(blob, wim->blob_table, &new_blob);
                        if (ret)
                                return ret;
-                       if (new_lte != lte)
-                               free_lookup_table_entry(lte);
+                       if (new_blob != blob)
+                               free_blob_descriptor(blob);
                }
        }
        return 0;
@@ -924,49 +880,18 @@ can_modify_wim(WIMStruct *wim)
        return 0;
 }
 
-/*
- * can_delete_from_wim - Check if files or images can be deleted from a given
- * WIM file.
- *
- * This theoretically should be exactly the same as can_modify_wim(), but
- * unfortunately, due to bugs in Microsoft's software that generate incorrect
- * reference counts for some WIM resources, we need to run expensive
- * verifications to make sure the reference counts are correct on all WIM
- * resources.  Otherwise we might delete a WIM resource whose reference count
- * has fallen to 0, but is actually still referenced somewhere.
- */
-int
-can_delete_from_wim(WIMStruct *wim)
-{
-       int ret;
-
-       ret = can_modify_wim(wim);
-       if (ret)
-               return ret;
-       if (!wim->refcnts_ok) {
-               ret = wim_recalculate_refcnts(wim);
-               if (ret)
-                       return ret;
-       }
-       return 0;
-}
-
 /* API function documented in wimlib.h  */
 WIMLIBAPI void
 wimlib_free(WIMStruct *wim)
 {
-       if (wim == NULL)
+       if (!wim)
                return;
 
-       DEBUG("Freeing WIMStruct (filename=\"%"TS"\", image_count=%u)",
-             wim->filename, wim->hdr.image_count);
-
        while (!list_empty(&wim->subwims)) {
                WIMStruct *subwim;
 
                subwim = list_entry(wim->subwims.next, WIMStruct, subwim_node);
                list_del(&subwim->subwim_node);
-               DEBUG("Freeing subwim.");
                wimlib_free(subwim);
        }
 
@@ -975,7 +900,7 @@ wimlib_free(WIMStruct *wim)
        if (filedes_valid(&wim->out_fd))
                filedes_close(&wim->out_fd);
 
-       free_lookup_table(wim->lookup_table);
+       free_blob_table(wim->blob_table);
 
        wimlib_free_decompressor(wim->decompressor);
 
@@ -1008,30 +933,42 @@ test_locale_ctype_utf8(void)
 WIMLIBAPI u32
 wimlib_get_version(void)
 {
-       return WIMLIB_VERSION_CODE;
+       return (WIMLIB_MAJOR_VERSION << 20) |
+              (WIMLIB_MINOR_VERSION << 10) |
+               WIMLIB_PATCH_VERSION;
 }
 
 static bool lib_initialized = false;
+static pthread_mutex_t lib_initialization_mutex = PTHREAD_MUTEX_INITIALIZER;
 
 /* API function documented in wimlib.h  */
 WIMLIBAPI int
 wimlib_global_init(int init_flags)
 {
+       int ret;
+
        if (lib_initialized)
                return 0;
 
+       pthread_mutex_lock(&lib_initialization_mutex);
+
+       ret = 0;
+       if (lib_initialized)
+               goto out;
+
 #ifdef ENABLE_ERROR_MESSAGES
-       if (wimlib_error_file == NULL)
+       if (!wimlib_error_file)
                wimlib_error_file = stderr;
 #endif
 
+       ret = WIMLIB_ERR_INVALID_PARAM;
        if (init_flags & ~(WIMLIB_INIT_FLAG_ASSUME_UTF8 |
                           WIMLIB_INIT_FLAG_DONT_ACQUIRE_PRIVILEGES |
                           WIMLIB_INIT_FLAG_STRICT_CAPTURE_PRIVILEGES |
                           WIMLIB_INIT_FLAG_STRICT_APPLY_PRIVILEGES |
                           WIMLIB_INIT_FLAG_DEFAULT_CASE_SENSITIVE |
                           WIMLIB_INIT_FLAG_DEFAULT_CASE_INSENSITIVE))
-               return WIMLIB_ERR_INVALID_PARAM;
+               goto out;
 
        libxml_global_init();
        if (!(init_flags & WIMLIB_INIT_FLAG_ASSUME_UTF8)) {
@@ -1042,11 +979,9 @@ wimlib_global_init(int init_flags)
        #endif
        }
 #ifdef __WIN32__
-       {
-               int ret = win32_global_init(init_flags);
-               if (ret)
-                       return ret;
-       }
+       ret = win32_global_init(init_flags);
+       if (ret)
+               goto out;
 #endif
        iconv_global_init();
        init_upcase();
@@ -1055,7 +990,10 @@ wimlib_global_init(int init_flags)
        else if (init_flags & WIMLIB_INIT_FLAG_DEFAULT_CASE_INSENSITIVE)
                default_ignore_case = true;
        lib_initialized = true;
-       return 0;
+       ret = 0;
+out:
+       pthread_mutex_unlock(&lib_initialization_mutex);
+       return ret;
 }
 
 /* API function documented in wimlib.h  */
@@ -1064,14 +1002,21 @@ wimlib_global_cleanup(void)
 {
        if (!lib_initialized)
                return;
+
+       pthread_mutex_lock(&lib_initialization_mutex);
+
+       if (!lib_initialized)
+               goto out;
+
        libxml_global_cleanup();
        iconv_global_cleanup();
 #ifdef __WIN32__
        win32_global_cleanup();
 #endif
-       cleanup_decompressor_params();
-       cleanup_compressor_params();
 
        wimlib_set_error_file(NULL);
        lib_initialized = false;
+
+out:
+       pthread_mutex_unlock(&lib_initialization_mutex);
 }