Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/lcms2/plugins/threaded/src/threaded_scheduler.c @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
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1 //---------------------------------------------------------------------------------
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2 //
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3 // Little Color Management System, multithreaded extensions
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4 // Copyright (c) 1998-2023 Marti Maria Saguer, all rights reserved
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5 //
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6 //
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7 // This program is free software: you can redistribute it and/or modify
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8 // it under the terms of the GNU General Public License as published by
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9 // the Free Software Foundation, either version 3 of the License, or
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10 // (at your option) any later version.
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11 //
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12 // This program is distributed in the hope that it will be useful,
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13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 // GNU General Public License for more details.
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16 //
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17 // You should have received a copy of the GNU General Public License
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18 // along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 //
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20 //---------------------------------------------------------------------------------
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21
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22 #include "threaded_internal.h"
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23
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24 // The scheduler is responsible to split the work in several portions in a way that each
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25 // portion can be calculated by a different thread. All locking is already done by lcms
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26 // mutexes, memory should not overlap.
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27 void _cmsThrScheduler(struct _cmstransform_struct* CMMcargo,
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28 const void* InputBuffer,
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29 void* OutputBuffer,
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30 cmsUInt32Number PixelsPerLine,
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31 cmsUInt32Number LineCount,
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32 const cmsStride* Stride)
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33 {
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34 cmsContext ContextID = cmsGetTransformContextID(CMMcargo);
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35 _cmsTransform2Fn worker = _cmsGetTransformWorker(CMMcargo);
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36 cmsInt32Number MaxWorkers = _cmsGetTransformMaxWorkers(CMMcargo);
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37
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38 // flags are not actually being used
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39 // cmsUInt32Number flags = _cmsGetTransformWorkerFlags(CMMcargo);
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40
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41 _cmsWorkSlice master;
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42 _cmsWorkSlice* slices;
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43 cmsStride FixedStride = *Stride;
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44 cmsHANDLE* handles;
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45
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46 // Count the number of threads needed for this job. MaxWorkers is the upper limit or -1 to auto
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47 cmsUInt32Number nSlices = _cmsThrCountSlices(CMMcargo, MaxWorkers, PixelsPerLine, LineCount, &FixedStride);
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48
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49 // Abort early if no threaded code
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50 if (nSlices <= 1) {
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51
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52 worker(CMMcargo, InputBuffer, OutputBuffer, PixelsPerLine, LineCount, Stride);
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53 return;
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54 }
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55
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56 // Setup master thread
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57 master.CMMcargo = CMMcargo;
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58 master.InputBuffer = InputBuffer;
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59 master.OutputBuffer = OutputBuffer;
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60 master.PixelsPerLine = PixelsPerLine;
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61 master.LineCount = LineCount;
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62 master.Stride = &FixedStride;
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63
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64 // Create memory for the slices
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65 slices = (_cmsWorkSlice*)_cmsCalloc(ContextID, nSlices, sizeof(_cmsWorkSlice));
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66 handles = (cmsHANDLE*) _cmsCalloc(ContextID, nSlices, sizeof(cmsHANDLE));
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67
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68 if (slices == NULL || handles == NULL)
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69 {
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70 if (slices) _cmsFree(ContextID, slices);
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71 if (handles) _cmsFree(ContextID, handles);
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72
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73 // Out of memory in this case only can come from a corruption, but we do the work anyway
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74 worker(CMMcargo, InputBuffer, OutputBuffer, PixelsPerLine, LineCount, Stride);
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75 return;
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76 }
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77
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78 // All seems ok so far
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79 if (_cmsThrSplitWork(&master, nSlices, slices))
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80 {
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81 // Work is splitted. Create threads
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82 cmsUInt32Number i;
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83
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84 for (i = 1; i < nSlices; i++)
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85 {
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86 handles[i] = _cmsThrCreateWorker(ContextID, worker, &slices[i]);
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87 }
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88
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89 // Do our portion of work
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90 worker(CMMcargo, slices[0].InputBuffer, slices[0].OutputBuffer,
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91 slices[0].PixelsPerLine, slices[0].LineCount, slices[0].Stride);
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92
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93 // Wait until all threads are finished
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94 for (i = 1; i < nSlices; i++)
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95 {
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96 _cmsThrJoinWorker(ContextID, handles[i]);
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97 }
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98 }
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99 else
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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100 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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101 // Not able to split the work, so don't thread
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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102 worker(CMMcargo, InputBuffer, OutputBuffer, PixelsPerLine, LineCount, Stride);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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103 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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104
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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105 _cmsFree(ContextID, slices);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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106 _cmsFree(ContextID, handles);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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107 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108