Changes in ex4.c

4e8208cbcbc709572b8abe32f33c78b69c819375 - Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Sat, 31 Jan 2026 18:41:18 +0000

Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetCtx ctx)See merge request petsc/petsc!8956 List of files: /petsc/src/ts/event/tests/ex4.c

2a8381b23c702518c6b1ccbeafee50b9375df0e4 - Add automatic generated fortran support for setting and returning contexts

Tue, 13 Jan 2026 04:45:38 +0000

Add automatic generated fortran support for setting and returning contextsMajor cleanup of the code for setting and returning application (previously called user) contexts - PetscCtx ctx is now the standard for passing in contexts - PetscCtxRt ctx is the standard for passing out contexts, including context destroy routines based on PetscCtxDestroyFnBoth of these are typedef to void*Also removed most use of user and userctx for context arguments now consistently named ctxImproved documentation on PetscCtx and PetscCtxRt and on how to use contexts (including getting them) from Fortran List of files: /petsc/src/ts/event/tests/ex4.c

2a1887a77e7b2c6e00dd0ba96d1387c839460237 - Merge branch 'barry/2025-11-30/fix-bad-ts' into 'main'

Thu, 11 Dec 2025 17:14:59 +0000

Merge branch 'barry/2025-11-30/fix-bad-ts' into 'main'Fix bad decisions made in writing TS.See merge request petsc/petsc!8877 List of files: /petsc/src/ts/event/tests/ex4.c

188af4bf1b9cf194d1407690fd963ae1ba8cff5d - Fix bad decisions made in writing TS.

Mon, 01 Dec 2025 02:10:33 +0000

Fix bad decisions made in writing TS. Fix -ts_dt to -ts_time_step and add initial time step to TSView outputcommit a5a92c11fa9681148df375b257eda4e09909b74eAuthor: Barry Smith Date: Mon Dec 1 14:51:27 2025 -0500 add max_snes_failures to TSViewcommit 32d3e79f6fa743930b1bbf32d03b9181b5b5418aAuthor: Barry Smith Fix wrongly named options and add to TSViewWrong name for options database key -ts_max_reject should be -ts_max_step_rejections!Add max_reject value to TSViewAdd max_snes_failures to TSViewAdd initial timestep to TSView List of files: /petsc/src/ts/event/tests/ex4.c

732aec7a18f2199fb53bb9a2f3aef439a834ce31 - Merge branch 'jolivet/remove-cast' into 'main'

Sun, 22 Sep 2024 17:54:06 +0000

Merge branch 'jolivet/remove-cast' into 'main'Use NULL or nullptr instead of casted 0See merge request petsc/petsc!7857 List of files: /petsc/src/ts/event/tests/ex4.c

c8025a5415d73fd1c6005393f2b0e60677bf5915 - Use NULL or nullptr instead of casted 0

Sat, 21 Sep 2024 07:20:33 +0000

Use NULL or nullptr instead of casted 0 List of files: /petsc/src/ts/event/tests/ex4.c

bff66efa9044f546ae447ed195723e21295eb6dd - Merge branch 'ilya-fursov/ts-fixevent2' into 'main'

Fri, 15 Dec 2023 16:29:03 +0000

Merge branch 'ilya-fursov/ts-fixevent2' into 'main'TSEvent: refactor and fix bugs, add TSSetPostEventStep()See merge request petsc/petsc!6752 List of files: /petsc/src/ts/event/tests/ex4.c

fe4ad979b698fa41c951a10ed910db35a8a8fc73 - Implement setting two distinct post-event steps

Sun, 03 Dec 2023 08:40:52 +0000

Implement setting two distinct post-event stepsThe two post-event steps are managed by:TSSetPostEventStep(), -ts_event_post_event_step,TSSetPostEventSecondStep(), -ts_event_post_event_second_step.(The latter function and option are replacement for the original PETScTSSetPostEventIntervalStep(), -ts_event_post_eventinterval_step,with some change of overall behaviour of 1st + 2nd steps).Also, reduce the number of tests ~ 4 times. List of files: /petsc/src/ts/event/tests/ex4.c

ca4445c7a2f5ca546b532f08b853c371604af17c - TSEvent: refactor and fix bugs, add TSSetPostEventStep()

Thu, 20 Jul 2023 19:18:16 +0000

TSEvent: refactor and fix bugs, add TSSetPostEventStep() Refactor the core algorithm for resolution of events: TSEventHandler() and the helper functions, fixing the existing bugs. Change event indicator functions from PetscScalar to PetscReal. Change the API of TSSetEventHandler(): in the user `indicator()` callback, the 'fvalue' argument type changed from PetscScalar[] to PetscReal[]. Add TSSetPostEventStep(), deprecate TSSetPostEventIntervalStep(). Deprecate option -ts_event_post_eventinterval_step. Fix bugs in interaction of TSEvent with tspan. Add six new test examples. Below are the examples of bugs fixed by this patch. The source codes (ex3.c, ex3span.c, ex4.c, ex5.c) can be found in src/ts/event/tests. To run them with the older Petsc versions, one would need to comment out "#define NEW_VERSION". Behaviour for three library versions is reported below: * ORIG: current Petsc version, before the proposed patch. * 6688: independently of the proposed patch, Merge Request 6688 was developed, which fixed some bugs with zero-crossing directions. * NEW : the proposed patch. ./ex3 -ts_monitor -ts_event_monitor -ts_view -ts_type beuler \ -ts_adapt_type basic -flg -V 1e9 -ts_adapt_dt_min 1e-6 -change5 1 -dir 1 * ORIG: fails to resolve 5 out of 6 events, and resolves 23 incorrect events. * 6688: fails to exit the TSEvent iteration via the step size (bracket size) criterion. * NEW : ok, resolves all 6 events. ./ex4 -ts_adapt_type basic -ts_type rk -ts_dt 0.25 -ts_event_tol 1e-8 \ -dir 0 -ts_adapt_dt_min 1e-10 -ts_view -ts_monitor -ts_event_monitor * ORIG: only reaches t = 0.0300236 after 10000 TS steps. * 6688: only reaches t = 0.0300236 after 10000 TS steps. * NEW : ok, reaches the final time t = 4.0 after 96 TS steps, resolving all 16 events. ./ex5 -ts_monitor -ts_event_monitor -ts_type rk -ts_adapt_type basic \ -ts_view -ts_dt 0.25 -flg -dir 0 * ORIG: only reaches t = 4.0 after 10000 TS steps, erroneously reports event at t = 4.0 around 5000 times. * 6688: only reaches t = 4.0 after 10000 TS steps. * NEW : ok, reaches the final time t = 10.0 after 99 TS steps, resolving all 34 events. ./ex5 -ts_monitor -ts_event_monitor -ts_type rk -ts_adapt_type basic \ -ts_view -ts_dt 0.25 -flg -dir 1 * ORIG: fails, starts taking negative time steps, no events are correctly resolved. * 6688: ok, but slower: 90 TS steps to resolve all 17 events. * NEW : ok, and faster: 48 TS steps to resolve all 17 events. ./ex5 -ts_monitor -ts_event_monitor -ts_type rk -ts_adapt_type basic \ -ts_view -ts_dt 0.25 -flg -dir -1 * ORIG: fails, starts taking 'nan' time steps. * 6688: mostly fails, only reaches t = 4.99993 after 10000 TS steps. * NEW : ok, reaches the final time t = 10.0 after 74 TS steps, resolving all 17 events. The same run in parallel: mpirun -n 2 ./ex5 -ts_monitor -ts_event_monitor -ts_type rk \ -ts_adapt_type basic -ts_view -ts_dt 0.25 -flg -dir -1 * ORIG: fails, starts taking negative time steps, exits with runtime error. * 6688: mostly fails, only reaches t = 3, besides, the parallel run is not consistent with the serial run (see above). * NEW : ok, reaches the final time t = 10.0 after 74 TS steps, resolving all 17 events. ./ex3span -ts_monitor -ts_event_monitor * ORIG: (confused by events) misses tspan points: 4.02, 4.21, 4.98, 5.01, 5.21, 5.98, 6, 6.01, 6.02, 6.21, 6.99, 7.21, 8.01, 8.21, 9.01. * 6688: (confused by events) misses tspan points: 4.02, 4.21, 4.98, 5.01, 5.21, 5.98, 6, 6.01, 6.02, 6.21, 6.99, 7.21, 8.01, 8.21, 9.01. * NEW : ok. ./ex3span -ts_monitor -ts_event_monitor -ts_event_post_event_step 0.5 * ORIG: misses the majority of tspan points (except 0.01 and 0.21), and also resolves the last event location at wrong time t = 9.21. * 6688: misses the majority of tspan points (except 0.01 and 0.21), and also resolves the last event location at wrong time t = 9.21. * NEW : ok. List of files: /petsc/src/ts/event/tests/ex4.c