forked from bartvdbraak/blender
Fix T38873: Crashing on undo of ocean modifier.
Issue of this bug is that most part of fftw is not thread safe, only compute-intensive fftw_execute & co are. Since smoke was affected by this issue as well, a global fftw mutex was added to BLI_threads. Audaspace also uses fftw in one of its readers (AUD_BandPassReader.cpp), but this is not an issue currently since this code is disabled in CMake/scons files. There was another threading issue with smoke, we need to copy dm used by emit_from_derivedmesh(), as it is modified by this func. Reviewers: sergey, brecht Reviewed By: brecht CC: brecht Differential Revision: https://developer.blender.org/D374
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@ -846,6 +846,8 @@ void BKE_init_ocean(struct Ocean *o, int M, int N, float Lx, float Lz, float V,
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o->_fft_in = (fftw_complex *)MEM_mallocN(o->_M * (1 + o->_N / 2) * sizeof(fftw_complex), "ocean_fft_in");
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o->_htilda = (fftw_complex *)MEM_mallocN(o->_M * (1 + o->_N / 2) * sizeof(fftw_complex), "ocean_htilda");
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BLI_lock_thread(LOCK_FFTW);
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if (o->_do_disp_y) {
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o->_disp_y = (double *)MEM_mallocN(o->_M * o->_N * sizeof(double), "ocean_disp_y");
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o->_disp_y_plan = fftw_plan_dft_c2r_2d(o->_M, o->_N, o->_fft_in, o->_disp_y, FFTW_ESTIMATE);
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@ -890,6 +892,8 @@ void BKE_init_ocean(struct Ocean *o, int M, int N, float Lx, float Lz, float V,
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o->_Jxz_plan = fftw_plan_dft_c2r_2d(o->_M, o->_N, o->_fft_in_jxz, o->_Jxz, FFTW_ESTIMATE);
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}
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BLI_unlock_thread(LOCK_FFTW);
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BLI_rw_mutex_unlock(&o->oceanmutex);
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set_height_normalize_factor(o);
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@ -903,6 +907,8 @@ void BKE_free_ocean_data(struct Ocean *oc)
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BLI_rw_mutex_lock(&oc->oceanmutex, THREAD_LOCK_WRITE);
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BLI_lock_thread(LOCK_FFTW);
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if (oc->_do_disp_y) {
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fftw_destroy_plan(oc->_disp_y_plan);
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MEM_freeN(oc->_disp_y);
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@ -939,6 +945,8 @@ void BKE_free_ocean_data(struct Ocean *oc)
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MEM_freeN(oc->_Jxz);
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}
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BLI_unlock_thread(LOCK_FFTW);
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if (oc->_fft_in)
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MEM_freeN(oc->_fft_in);
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@ -207,7 +207,14 @@ void smoke_reallocate_highres_fluid(SmokeDomainSettings *sds, float dx, int res[
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sds->wt = NULL;
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return;
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}
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/* smoke_turbulence_init uses non-threadsafe functions from fftw3 lib (like fftw_plan & co). */
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BLI_lock_thread(LOCK_FFTW);
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sds->wt = smoke_turbulence_init(res, sds->amplify + 1, sds->noise, BLI_temporary_dir(), use_fire, use_colors);
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BLI_unlock_thread(LOCK_FFTW);
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sds->res_wt[0] = res[0] * (sds->amplify + 1);
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sds->res_wt[1] = res[1] * (sds->amplify + 1);
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sds->res_wt[2] = res[2] * (sds->amplify + 1);
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@ -1550,7 +1557,7 @@ static void emit_from_derivedmesh(Object *flow_ob, SmokeDomainSettings *sds, Smo
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{
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if (!sfs->dm) return;
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{
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DerivedMesh *dm = sfs->dm;
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DerivedMesh *dm;
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int defgrp_index = sfs->vgroup_density - 1;
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MDeformVert *dvert = NULL;
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MVert *mvert = NULL;
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@ -1566,6 +1573,11 @@ static void emit_from_derivedmesh(Object *flow_ob, SmokeDomainSettings *sds, Smo
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int min[3], max[3], res[3];
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int hires_multiplier = 1;
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/* copy derivedmesh for thread safety because we modify it,
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* main issue is its VertArray being modified, then replaced and freed
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*/
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dm = CDDM_copy(sfs->dm);
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CDDM_calc_normals(dm);
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mvert = dm->getVertArray(dm);
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mvert_orig = dm->dupVertArray(dm); /* copy original mvert and restore when done */
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@ -88,6 +88,7 @@ int BLI_system_num_threads_override_get(void);
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#define LOCK_NODES 6
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#define LOCK_MOVIECLIP 7
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#define LOCK_COLORMANAGE 8
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#define LOCK_FFTW 9
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void BLI_lock_thread(int type);
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void BLI_unlock_thread(int type);
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@ -121,6 +121,7 @@ static pthread_mutex_t _opengl_lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _nodes_lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _movieclip_lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _colormanage_lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t _fftw_lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_t mainid;
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static int thread_levels = 0; /* threads can be invoked inside threads */
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static int num_threads_override = 0;
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@ -399,6 +400,8 @@ void BLI_lock_thread(int type)
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pthread_mutex_lock(&_movieclip_lock);
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else if (type == LOCK_COLORMANAGE)
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pthread_mutex_lock(&_colormanage_lock);
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else if (type == LOCK_FFTW)
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pthread_mutex_lock(&_fftw_lock);
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}
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void BLI_unlock_thread(int type)
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@ -421,6 +424,8 @@ void BLI_unlock_thread(int type)
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pthread_mutex_unlock(&_movieclip_lock);
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else if (type == LOCK_COLORMANAGE)
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pthread_mutex_unlock(&_colormanage_lock);
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else if (type == LOCK_FFTW)
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pthread_mutex_unlock(&_fftw_lock);
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}
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/* Mutex Locks */
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