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cell.h
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cell.h
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/*******************************************************************************
* This file is part of SWIFT.
* Copyright (c) 2012 Pedro Gonnet (pedro.gonnet@durham.ac.uk)
* Matthieu Schaller (matthieu.schaller@durham.ac.uk)
* 2015 Peter W. Draper (p.w.draper@durham.ac.uk)
* 2016 John A. Regan (john.a.regan@durham.ac.uk)
* Tom Theuns (tom.theuns@durham.ac.uk)
*
* This program 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.
*
* This program 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 Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
#ifndef SWIFT_CELL_H
#define SWIFT_CELL_H
/* Config parameters. */
#include "../config.h"
/* Includes. */
#include <stddef.h>
#include <stdint.h>
#include <string.h>
/* Local includes. */
#include "align.h"
#include "cell_black_holes.h"
#include "cell_grav.h"
#include "cell_hydro.h"
#include "cell_sinks.h"
#include "cell_stars.h"
#include "kernel_hydro.h"
#include "multipole_struct.h"
#include "part.h"
#include "periodic.h"
#include "sort_part.h"
#include "space.h"
#include "task.h"
#include "timeline.h"
/* Avoid cyclic inclusions */
struct engine;
struct scheduler;
/* Max tag size set to 2^29 to take into account some MPI implementations
* that use 2^31 as the upper bound on MPI tags and the fact that
* cell_next_tag is multiplied by 2 when passed to an MPI function.
* The maximum was lowered by a further factor of 2 to be on the safe side.*/
#define cell_max_tag (1 << 29)
#define cell_align 128
/* Global variables. */
extern int cell_next_tag;
/*! Counter for cell IDs (when exceeding max values for uniqueness) */
#if defined(SWIFT_DEBUG_CHECKS) || defined(SWIFT_CELL_GRAPH)
extern unsigned long long last_cell_id;
extern unsigned long long last_leaf_cell_id;
#endif
/* Struct to temporarily buffer the particle locations and bin id. */
struct cell_buff {
double x[3];
int ind;
} SWIFT_STRUCT_ALIGN;
/* Mini struct to link cells to tasks. Used as a linked list. */
struct link {
/* The task pointer. */
struct task *t;
/* The next pointer. */
struct link *next;
};
/* Holds the pairs of progeny for each sid. */
struct cell_split_pair {
int count;
struct {
int pid;
int pjd;
int sid;
} pairs[16];
};
extern struct cell_split_pair cell_split_pairs[13];
/**
* @brief Packed cell for information correct at rebuild time.
*
* Contains all the information for a tree walk in a non-local cell.
*/
struct pcell {
/*! Hydro variables */
struct {
/*! Number of #part in this cell. */
int count;
/*! Maximal smoothing length. */
float h_max;
/*! Minimal integer end-of-timestep in this cell for hydro tasks */
integertime_t ti_end_min;
/*! Maximal integer beginning-of-timestep in this cell for hydro tasks */
integertime_t ti_beg_max;
/*! Integer time of the last drift of the #part in this cell */
integertime_t ti_old_part;
} hydro;
/*! Gravity variables */
struct {
/*! This cell's gravity-related tensors */
struct multipole m_pole;
/*! Centre of mass. */
double CoM[3];
/*! Centre of mass at rebuild time. */
double CoM_rebuild[3];
/*! Upper limit of the CoM<->gpart distance. */
double r_max;
/*! Upper limit of the CoM<->gpart distance at last rebuild. */
double r_max_rebuild;
/*! Minimal integer end-of-timestep in this cell for gravity tasks */
integertime_t ti_end_min;
/*! Maximal integer beginning-of-timestep in this cell for gravity tasks */
integertime_t ti_beg_max;
/*! Integer time of the last drift of the #gpart in this cell */
integertime_t ti_old_part;
/*! Integer time of the last drift of the #multipole in this cell */
integertime_t ti_old_multipole;
/*! Number of #gpart in this cell. */
int count;
} grav;
/*! Stars variables */
struct {
/*! Number of #spart in this cell. */
int count;
/*! Maximal smoothing length. */
float h_max;
/*! Minimal integer end-of-timestep in this cell for stars tasks */
integertime_t ti_end_min;
/*! Integer time of the last drift of the #spart in this cell */
integertime_t ti_old_part;
} stars;
/*! Black hole variables */
struct {
/*! Number of #spart in this cell. */
int count;
/*! Maximal smoothing length. */
float h_max;
/*! Minimal integer end-of-timestep in this cell for black hole tasks */
integertime_t ti_end_min;
/*! Integer time of the last drift of the #spart in this cell */
integertime_t ti_old_part;
} black_holes;
/*! Sink variables */
struct {
/*! Number of #sink in this cell. */
int count;
/*! Maximal cut off radius. */
float r_cut_max;
/*! Minimal integer end-of-timestep in this cell for sinks tasks */
integertime_t ti_end_min;
/*! Integer time of the last drift of the #sink in this cell */
integertime_t ti_old_part;
} sinks;
/*! Maximal depth in that part of the tree */
int maxdepth;
/*! Relative indices of the cell's progeny. */
int progeny[8];
#ifdef SWIFT_DEBUG_CHECKS
/* Cell ID (for debugging) */
unsigned long long cellID;
#endif
} SWIFT_STRUCT_ALIGN;
/**
* @brief Cell information at the end of a time-step.
*/
struct pcell_step {
struct {
/*! Minimal integer end-of-timestep in this cell (hydro) */
integertime_t ti_end_min;
/*! Maximal distance any #part has travelled since last rebuild */
float dx_max_part;
} hydro;
struct {
/*! Minimal integer end-of-timestep in this cell (gravity) */
integertime_t ti_end_min;
} grav;
struct {
/*! Minimal integer end-of-timestep in this cell (stars) */
integertime_t ti_end_min;
/*! Maximal distance any #part has travelled since last rebuild */
float dx_max_part;
} stars;
struct {
/*! Minimal integer end-of-timestep in this cell (black_holes) */
integertime_t ti_end_min;
/*! Maximal distance any #part has travelled since last rebuild */
float dx_max_part;
} black_holes;
};
/**
* @brief Cell information to propagate the new counts of star particles.
*/
struct pcell_sf {
/*! Stars variables */
struct {
/* Distance by which the stars pointer has moved since the last rebuild */
ptrdiff_t delta_from_rebuild;
/* Number of particles in the cell */
int count;
/*! Maximum part movement in this cell since last construction. */
float dx_max_part;
} stars;
/*! Grav. variables */
struct {
/* Distance by which the gpart pointer has moved since the last rebuild */
ptrdiff_t delta_from_rebuild;
/* Number of particles in the cell */
int count;
} grav;
};
/**
* @brief Bitmasks for the cell flags. Beware when adding flags that you don't
* exceed the size of the flags variable in the struct cell.
*/
enum cell_flags {
cell_flag_split = (1UL << 0),
cell_flag_do_hydro_drift = (1UL << 1),
cell_flag_do_hydro_sub_drift = (1UL << 2),
cell_flag_do_hydro_sub_sort = (1UL << 3),
cell_flag_do_hydro_limiter = (1UL << 4),
cell_flag_do_hydro_sub_limiter = (1UL << 5),
cell_flag_do_grav_drift = (1UL << 6),
cell_flag_do_grav_sub_drift = (1UL << 7),
cell_flag_do_stars_sub_sort = (1UL << 8),
cell_flag_do_stars_drift = (1UL << 9),
cell_flag_do_stars_sub_drift = (1UL << 10),
cell_flag_do_bh_drift = (1UL << 11),
cell_flag_do_bh_sub_drift = (1UL << 12),
cell_flag_do_sink_drift = (1UL << 13),
cell_flag_do_sink_sub_drift = (1UL << 14),
cell_flag_do_stars_resort = (1UL << 15),
cell_flag_has_tasks = (1UL << 16),
cell_flag_do_hydro_sync = (1UL << 17),
cell_flag_do_hydro_sub_sync = (1UL << 18),
cell_flag_unskip_self_grav_processed = (1UL << 19),
cell_flag_unskip_pair_grav_processed = (1UL << 20)
};
/**
* @brief Cell within the tree structure.
*
* Contains particles, links to tasks, a multipole object and counters.
*/
struct cell {
/*! The cell location on the grid (corner nearest to the origin). */
double loc[3];
/*! The cell dimensions. */
double width[3];
/*! Pointers to the next level of cells. */
struct cell *progeny[8];
union {
/*! Linking pointer for "memory management". */
struct cell *next;
/*! Parent cell. */
struct cell *parent;
};
/*! Pointer to the top-level cell in a hierarchy */
struct cell *top;
/*! Super cell, i.e. the highest-level parent cell with *any* task */
struct cell *super;
/*! Cell flags bit-mask. */
volatile uint32_t flags;
/*! Hydro variables */
struct cell_hydro hydro;
/*! Grav variables */
struct cell_grav grav;
/*! Stars variables */
struct cell_stars stars;
/*! Black hole variables */
struct cell_black_holes black_holes;
/*! Sink particles variables */
struct cell_sinks sinks;
#ifdef WITH_MPI
/*! MPI variables */
struct {
union {
/* Single list of all send tasks associated with this cell. */
struct link *send;
/* Single list of all recv tasks associated with this cell. */
struct link *recv;
};
union {
/* Single list of all pack tasks associated with this cell. */
struct link *pack;
/* Single list of all unpack tasks associated with this cell. */
struct link *unpack;
};
/*! Bit mask of the proxies this cell is registered with. */
unsigned long long int sendto;
/*! Pointer to this cell's packed representation. */
struct pcell *pcell;
/*! Size of the packed representation */
int pcell_size;
/*! MPI tag associated with this cell */
int tag;
} mpi;
#endif
/*! The first kick task */
struct task *kick1;
/*! The second kick task */
struct task *kick2;
/*! The task to compute time-steps */
struct task *timestep;
/*! The task to limit the time-step of inactive particles */
struct task *timestep_limiter;
/*! The task to synchronize the time-step of inactive particles hit by
* feedback */
struct task *timestep_sync;
/*! The task to recursively collect time-steps */
struct task *timestep_collect;
#ifdef WITH_CSDS
/*! The csds task */
struct task *csds;
#endif
/*! Minimum dimension, i.e. smallest edge of this cell (min(width)). */
float dmin;
/*! ID of the previous owner, e.g. runner. */
int owner;
/*! ID of the node this cell lives on. */
int nodeID;
/*! Number of tasks that are associated with this cell. */
short int nr_tasks;
/*! The depth of this cell in the tree. */
char depth;
/*! Is this cell split ? */
char split;
/*! The maximal depth of this cell and its progenies */
char maxdepth;
#if defined(SWIFT_DEBUG_CHECKS) || defined(SWIFT_CELL_GRAPH)
/* Cell ID (for debugging) */
long long cellID;
#endif
#ifdef SWIFT_DEBUG_CHECKS
/*! The list of tasks that have been executed on this cell */
char tasks_executed[task_type_count];
/*! The list of sub-tasks that have been executed on this cell */
char subtasks_executed[task_type_count];
#endif
} SWIFT_STRUCT_ALIGN;
/* Convert cell location to ID. */
#define cell_getid(cdim, i, j, k) \
((int)(k) + (cdim)[2] * ((int)(j) + (cdim)[1] * (int)(i)))
/* Function prototypes. */
void cell_split(struct cell *c, ptrdiff_t parts_offset, ptrdiff_t sparts_offset,
ptrdiff_t bparts_offset, ptrdiff_t sinks_offset,
struct cell_buff *buff, struct cell_buff *sbuff,
struct cell_buff *bbuff, struct cell_buff *gbuff,
struct cell_buff *sinkbuff);
void cell_sanitize(struct cell *c, int treated);
int cell_locktree(struct cell *c);
void cell_unlocktree(struct cell *c);
int cell_glocktree(struct cell *c);
void cell_gunlocktree(struct cell *c);
int cell_mlocktree(struct cell *c);
void cell_munlocktree(struct cell *c);
int cell_slocktree(struct cell *c);
void cell_sunlocktree(struct cell *c);
int cell_sink_locktree(struct cell *c);
void cell_sink_unlocktree(struct cell *c);
int cell_blocktree(struct cell *c);
void cell_bunlocktree(struct cell *c);
int cell_pack(struct cell *c, struct pcell *pc, const int with_gravity);
int cell_unpack(struct pcell *pc, struct cell *c, struct space *s,
const int with_gravity);
void cell_pack_part_swallow(const struct cell *c,
struct black_holes_part_data *data);
void cell_unpack_part_swallow(struct cell *c,
const struct black_holes_part_data *data);
void cell_pack_bpart_swallow(const struct cell *c,
struct black_holes_bpart_data *data);
void cell_unpack_bpart_swallow(struct cell *c,
const struct black_holes_bpart_data *data);
int cell_pack_tags(const struct cell *c, int *tags);
int cell_unpack_tags(const int *tags, struct cell *c);
int cell_pack_end_step(const struct cell *c, struct pcell_step *pcell);
int cell_unpack_end_step(struct cell *c, const struct pcell_step *pcell);
void cell_pack_timebin(const struct cell *const c, timebin_t *const t);
void cell_unpack_timebin(struct cell *const c, timebin_t *const t);
int cell_pack_multipoles(struct cell *c, struct gravity_tensors *m);
int cell_unpack_multipoles(struct cell *c, struct gravity_tensors *m);
int cell_pack_sf_counts(struct cell *c, struct pcell_sf *pcell);
int cell_unpack_sf_counts(struct cell *c, struct pcell_sf *pcell);
int cell_get_tree_size(struct cell *c);
int cell_link_parts(struct cell *c, struct part *parts);
int cell_link_gparts(struct cell *c, struct gpart *gparts);
int cell_link_sparts(struct cell *c, struct spart *sparts);
int cell_link_bparts(struct cell *c, struct bpart *bparts);
int cell_link_foreign_parts(struct cell *c, struct part *parts);
int cell_link_foreign_gparts(struct cell *c, struct gpart *gparts);
void cell_unlink_foreign_particles(struct cell *c);
int cell_count_parts_for_tasks(const struct cell *c);
int cell_count_gparts_for_tasks(const struct cell *c);
void cell_clean_links(struct cell *c, void *data);
void cell_make_multipoles(struct cell *c, integertime_t ti_current,
const struct gravity_props *const grav_props);
void cell_check_multipole(struct cell *c,
const struct gravity_props *const grav_props);
void cell_check_foreign_multipole(const struct cell *c);
void cell_clean(struct cell *c);
void cell_check_part_drift_point(struct cell *c, void *data);
void cell_check_gpart_drift_point(struct cell *c, void *data);
void cell_check_spart_drift_point(struct cell *c, void *data);
void cell_check_sink_drift_point(struct cell *c, void *data);
void cell_check_multipole_drift_point(struct cell *c, void *data);
void cell_reset_task_counters(struct cell *c);
int cell_unskip_hydro_tasks(struct cell *c, struct scheduler *s);
int cell_unskip_stars_tasks(struct cell *c, struct scheduler *s,
const int with_star_formation,
const int with_star_formation_sink);
int cell_unskip_sinks_tasks(struct cell *c, struct scheduler *s);
int cell_unskip_rt_tasks(struct cell *c, struct scheduler *s);
int cell_unskip_black_holes_tasks(struct cell *c, struct scheduler *s);
int cell_unskip_gravity_tasks(struct cell *c, struct scheduler *s);
void cell_drift_part(struct cell *c, const struct engine *e, int force);
void cell_drift_gpart(struct cell *c, const struct engine *e, int force);
void cell_drift_spart(struct cell *c, const struct engine *e, int force);
void cell_drift_sink(struct cell *c, const struct engine *e, int force);
void cell_drift_bpart(struct cell *c, const struct engine *e, int force);
void cell_drift_multipole(struct cell *c, const struct engine *e);
void cell_drift_all_multipoles(struct cell *c, const struct engine *e);
void cell_check_timesteps(const struct cell *c, const integertime_t ti_current,
const timebin_t max_bin);
void cell_store_pre_drift_values(struct cell *c);
void cell_set_star_resort_flag(struct cell *c);
void cell_activate_star_formation_tasks(struct cell *c, struct scheduler *s,
const int with_feedback);
void cell_activate_star_formation_sink_tasks(struct cell *c,
struct scheduler *s,
const int with_feedback);
void cell_activate_sink_formation_tasks(struct cell *c, struct scheduler *s);
void cell_activate_subcell_hydro_tasks(struct cell *ci, struct cell *cj,
struct scheduler *s,
const int with_timestep_limiter);
int cell_activate_subcell_grav_tasks(struct cell *ci, struct cell *cj,
struct scheduler *s);
void cell_activate_subcell_stars_tasks(struct cell *ci, struct cell *cj,
struct scheduler *s,
const int with_star_formation,
const int with_star_formation_sink,
const int with_timestep_sync);
void cell_activate_subcell_sinks_tasks(struct cell *ci, struct cell *cj,
struct scheduler *s,
const int with_timestep_sync);
void cell_activate_subcell_black_holes_tasks(struct cell *ci, struct cell *cj,
struct scheduler *s,
const int with_timestep_sync);
void cell_activate_subcell_external_grav_tasks(struct cell *ci,
struct scheduler *s);
void cell_activate_subcell_rt_tasks(struct cell *ci, struct cell *cj,
struct scheduler *s);
void cell_activate_super_spart_drifts(struct cell *c, struct scheduler *s);
void cell_activate_super_sink_drifts(struct cell *c, struct scheduler *s);
void cell_activate_drift_part(struct cell *c, struct scheduler *s);
void cell_activate_drift_gpart(struct cell *c, struct scheduler *s);
void cell_activate_drift_spart(struct cell *c, struct scheduler *s);
void cell_activate_drift_sink(struct cell *c, struct scheduler *s);
void cell_activate_drift_bpart(struct cell *c, struct scheduler *s);
void cell_activate_sync_part(struct cell *c, struct scheduler *s);
void cell_activate_hydro_sorts(struct cell *c, int sid, struct scheduler *s);
void cell_activate_stars_sorts(struct cell *c, int sid, struct scheduler *s);
void cell_activate_limiter(struct cell *c, struct scheduler *s);
void cell_clear_drift_flags(struct cell *c, void *data);
void cell_clear_limiter_flags(struct cell *c, void *data);
void cell_set_super_mapper(void *map_data, int num_elements, void *extra_data);
void cell_check_spart_pos(const struct cell *c,
const struct spart *global_sparts);
void cell_check_sort_flags(const struct cell *c);
void cell_clear_stars_sort_flags(struct cell *c, const int unused_flags);
void cell_clear_hydro_sort_flags(struct cell *c, const int unused_flags);
int cell_has_tasks(struct cell *c);
void cell_remove_part(const struct engine *e, struct cell *c, struct part *p,
struct xpart *xp);
void cell_remove_gpart(const struct engine *e, struct cell *c,
struct gpart *gp);
void cell_remove_spart(const struct engine *e, struct cell *c,
struct spart *sp);
void cell_remove_sink(const struct engine *e, struct cell *c,
struct sink *sink);
void cell_remove_bpart(const struct engine *e, struct cell *c,
struct bpart *bp);
struct spart *cell_add_spart(struct engine *e, struct cell *c);
struct gpart *cell_add_gpart(struct engine *e, struct cell *c);
struct spart *cell_spawn_new_spart_from_part(struct engine *e, struct cell *c,
const struct part *p,
const struct xpart *xp);
struct spart *cell_spawn_new_spart_from_sink(struct engine *e, struct cell *c,
const struct sink *s);
struct gpart *cell_convert_part_to_gpart(const struct engine *e, struct cell *c,
struct part *p, struct xpart *xp);
struct gpart *cell_convert_spart_to_gpart(const struct engine *e,
struct cell *c, struct spart *sp);
struct spart *cell_convert_part_to_spart(struct engine *e, struct cell *c,
struct part *p, struct xpart *xp);
struct sink *cell_convert_part_to_sink(struct engine *e, struct cell *c,
struct part *p, struct xpart *xp);
void cell_reorder_extra_parts(struct cell *c, const ptrdiff_t parts_offset);
void cell_reorder_extra_gparts(struct cell *c, struct part *parts,
struct spart *sparts, struct sink *sinks);
void cell_reorder_extra_sparts(struct cell *c, const ptrdiff_t sparts_offset);
void cell_reorder_extra_sinks(struct cell *c, const ptrdiff_t sinks_offset);
int cell_can_use_pair_mm(const struct cell *ci, const struct cell *cj,
const struct engine *e, const struct space *s,
const int use_rebuild_data, const int is_tree_walk);
/**
* @brief Compute the square of the minimal distance between any two points in
* two cells of the same size
*
* @param ci The first #cell.
* @param cj The second #cell.
* @param periodic Are we using periodic BCs?
* @param dim The dimensions of the simulation volume
*/
__attribute__((always_inline)) INLINE static double cell_min_dist2_same_size(
const struct cell *restrict ci, const struct cell *restrict cj,
const int periodic, const double dim[3]) {
#ifdef SWIFT_DEBUG_CHECKS
if (ci->width[0] != cj->width[0]) error("Cells of different size!");
if (ci->width[1] != cj->width[1]) error("Cells of different size!");
if (ci->width[2] != cj->width[2]) error("Cells of different size!");
#endif
const double cix_min = ci->loc[0];
const double ciy_min = ci->loc[1];
const double ciz_min = ci->loc[2];
const double cjx_min = cj->loc[0];
const double cjy_min = cj->loc[1];
const double cjz_min = cj->loc[2];
const double cix_max = ci->loc[0] + ci->width[0];
const double ciy_max = ci->loc[1] + ci->width[1];
const double ciz_max = ci->loc[2] + ci->width[2];
const double cjx_max = cj->loc[0] + cj->width[0];
const double cjy_max = cj->loc[1] + cj->width[1];
const double cjz_max = cj->loc[2] + cj->width[2];
if (periodic) {
const double dx = min4(fabs(nearest(cix_min - cjx_min, dim[0])),
fabs(nearest(cix_min - cjx_max, dim[0])),
fabs(nearest(cix_max - cjx_min, dim[0])),
fabs(nearest(cix_max - cjx_max, dim[0])));
const double dy = min4(fabs(nearest(ciy_min - cjy_min, dim[1])),
fabs(nearest(ciy_min - cjy_max, dim[1])),
fabs(nearest(ciy_max - cjy_min, dim[1])),
fabs(nearest(ciy_max - cjy_max, dim[1])));
const double dz = min4(fabs(nearest(ciz_min - cjz_min, dim[2])),
fabs(nearest(ciz_min - cjz_max, dim[2])),
fabs(nearest(ciz_max - cjz_min, dim[2])),
fabs(nearest(ciz_max - cjz_max, dim[2])));
return dx * dx + dy * dy + dz * dz;
} else {
const double dx = min(fabs(cix_max - cjx_min), fabs(cix_min - cjx_max));
const double dy = min(fabs(ciy_max - cjy_min), fabs(ciy_min - cjy_max));
const double dz = min(fabs(ciz_max - cjz_min), fabs(ciz_min - cjz_max));
return dx * dx + dy * dy + dz * dz;
}
}
/* Inlined functions (for speed). */
/**
* @brief Can a sub-pair hydro task recurse to a lower level based
* on the status of the particles in the cell.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_pair_hydro_task(const struct cell *c) {
/* Is the cell split ? */
/* If so, is the cut-off radius plus the max distance the parts have moved */
/* smaller than the sub-cell sizes ? */
/* Note: We use the _old values as these might have been updated by a drift */
return c->split && ((kernel_gamma * c->hydro.h_max_old +
c->hydro.dx_max_part_old) < 0.5f * c->dmin);
}
/**
* @brief Can a sub-self hydro task recurse to a lower level based
* on the status of the particles in the cell.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_self_hydro_task(const struct cell *c) {
/* Is the cell split and not smaller than the smoothing length? */
return c->split && (kernel_gamma * c->hydro.h_max_old < 0.5f * c->dmin);
}
/**
* @brief Can a sub-pair star task recurse to a lower level based
* on the status of the particles in the cell.
*
* @param ci The #cell with stars.
* @param cj The #cell with hydro parts.
*/
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_pair_stars_task(const struct cell *ci,
const struct cell *cj) {
/* Is the cell split ? */
/* If so, is the cut-off radius plus the max distance the parts have moved */
/* smaller than the sub-cell sizes ? */
/* Note: We use the _old values as these might have been updated by a drift */
return ci->split && cj->split &&
((kernel_gamma * ci->stars.h_max_old + ci->stars.dx_max_part_old) <
0.5f * ci->dmin) &&
((kernel_gamma * cj->hydro.h_max_old + cj->hydro.dx_max_part_old) <
0.5f * cj->dmin);
}
/**
* @brief Can a sub-self stars task recurse to a lower level based
* on the status of the particles in the cell.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_self_stars_task(const struct cell *c) {
/* Is the cell split and not smaller than the smoothing length? */
return c->split && (kernel_gamma * c->stars.h_max_old < 0.5f * c->dmin) &&
(kernel_gamma * c->hydro.h_max_old < 0.5f * c->dmin);
}
/**
* @brief Can a sub-pair sink task recurse to a lower level based
* on the status of the particles in the cell.
*
* @param ci The #cell with stars.
* @param cj The #cell with hydro parts.
*/
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_pair_sinks_task(const struct cell *ci,
const struct cell *cj) {
/* Is the cell split ? */
/* If so, is the cut-off radius plus the max distance the parts have moved */
/* smaller than the sub-cell sizes ? */
/* Note: We use the _old values as these might have been updated by a drift */
return ci->split && cj->split &&
((ci->sinks.r_cut_max_old + ci->sinks.dx_max_part_old) <
0.5f * ci->dmin) &&
((kernel_gamma * cj->hydro.h_max_old + cj->hydro.dx_max_part_old) <
0.5f * cj->dmin);
}
/**
* @brief Can a sub-pair black hole task recurse to a lower level based
* on the status of the particles in the cell.
*
* @param ci The #cell with black holes.
* @param cj The #cell with hydro parts.
*/
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_pair_black_holes_task(const struct cell *ci,
const struct cell *cj) {
/* Is the cell split ? */
/* If so, is the cut-off radius plus the max distance the parts have moved */
/* smaller than the sub-cell sizes ? */
/* Note: We use the _old values as these might have been updated by a drift */
return ci->split && cj->split &&
((kernel_gamma * ci->black_holes.h_max_old +
ci->black_holes.dx_max_part_old) < 0.5f * ci->dmin) &&
((kernel_gamma * cj->hydro.h_max_old + cj->hydro.dx_max_part_old) <
0.5f * cj->dmin);
}
/**
* @brief Can a sub-self black hole task recurse to a lower level based
* on the status of the particles in the cell.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_self_black_holes_task(const struct cell *c) {
/* Is the cell split and not smaller than the smoothing length? */
return c->split &&
(kernel_gamma * c->black_holes.h_max_old < 0.5f * c->dmin) &&
(kernel_gamma * c->hydro.h_max_old < 0.5f * c->dmin);
}
/**
* @brief Can a sub-self sinks task recurse to a lower level based
* on the status of the particles in the cell.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int
cell_can_recurse_in_self_sinks_task(const struct cell *c) {
/* Is the cell split and not smaller than the smoothing length? */
return c->split && (c->sinks.r_cut_max_old < 0.5f * c->dmin) &&
(kernel_gamma * c->hydro.h_max_old < 0.5f * c->dmin);
}
/**
* @brief Can a pair hydro task associated with a cell be split into smaller
* sub-tasks.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int cell_can_split_pair_hydro_task(
const struct cell *c) {
/* Is the cell split ? */
/* If so, is the cut-off radius with some leeway smaller than */
/* the sub-cell sizes ? */
/* Note that since tasks are create after a rebuild no need to take */
/* into account any part motion (i.e. dx_max == 0 here) */
return c->split &&
(space_stretch * kernel_gamma * c->hydro.h_max < 0.5f * c->dmin) &&
(space_stretch * kernel_gamma * c->stars.h_max < 0.5f * c->dmin) &&
(space_stretch * kernel_gamma * c->black_holes.h_max < 0.5f * c->dmin);
}
/**
* @brief Can a self hydro task associated with a cell be split into smaller
* sub-tasks.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int cell_can_split_self_hydro_task(
const struct cell *c) {
/* Is the cell split ? */
/* If so, is the cut-off radius with some leeway smaller than */
/* the sub-cell sizes ? */
/* Note: No need for more checks here as all the sub-pairs and sub-self */
/* tasks will be created. So no need to check for h_max */
return c->split &&
(space_stretch * kernel_gamma * c->hydro.h_max < 0.5f * c->dmin) &&
(space_stretch * kernel_gamma * c->stars.h_max < 0.5f * c->dmin) &&
(space_stretch * kernel_gamma * c->black_holes.h_max < 0.5f * c->dmin);
}
/**
* @brief Can a pair gravity task associated with a cell be split into smaller
* sub-tasks.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int
cell_can_split_pair_gravity_task(const struct cell *c) {
/* Is the cell split and still far from the leaves ? */
return c->split && ((c->maxdepth - c->depth) > space_subdepth_diff_grav);
}
/**
* @brief Can a self gravity task associated with a cell be split into smaller
* sub-tasks.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int
cell_can_split_self_gravity_task(const struct cell *c) {
/* Is the cell split and still far from the leaves ? */
return c->split && ((c->maxdepth - c->depth) > space_subdepth_diff_grav);
}
/**
* @brief Can a self FOF task associated with a cell be split into smaller
* sub-tasks.
*
* @param c The #cell.
*/
__attribute__((always_inline)) INLINE static int cell_can_split_self_fof_task(
const struct cell *c) {
/* Is the cell split ? */
return c->split && c->grav.count > 5000 &&
((c->maxdepth - c->depth) > space_subdepth_diff_grav);
}
/**
* @brief Have gas particles in a pair of cells moved too much and require a
* rebuild
* ?
*
* @param ci The first #cell.
* @param cj The second #cell.
*/
__attribute__((always_inline, nonnull)) INLINE static int
cell_need_rebuild_for_hydro_pair(const struct cell *ci, const struct cell *cj) {
/* Is the cut-off radius plus the max distance the parts in both cells have */
/* moved larger than the cell size ? */
/* Note ci->dmin == cj->dmin */
if (kernel_gamma * max(ci->hydro.h_max, cj->hydro.h_max) +
ci->hydro.dx_max_part + cj->hydro.dx_max_part >
cj->dmin) {
return 1;
}
return 0;
}
/**
* @brief Have star particles in a pair of cells moved too much and require a
* rebuild?
*
* @param ci The first #cell.
* @param cj The second #cell.
*/
__attribute__((always_inline, nonnull)) INLINE static int
cell_need_rebuild_for_stars_pair(const struct cell *ci, const struct cell *cj) {
/* Is the cut-off radius plus the max distance the parts in both cells have */
/* moved larger than the cell size ? */
/* Note ci->dmin == cj->dmin */
if (kernel_gamma * max(ci->stars.h_max, cj->hydro.h_max) +
ci->stars.dx_max_part + cj->hydro.dx_max_part >
cj->dmin) {
return 1;
}
return 0;
}
/**
* @brief Have sink particles in a pair of cells moved too much and require a
* rebuild?
*
* @param ci The first #cell.
* @param cj The second #cell.
*/
__attribute__((always_inline, nonnull)) INLINE static int
cell_need_rebuild_for_sinks_pair(const struct cell *ci, const struct cell *cj) {
/* Is the cut-off radius plus the max distance the parts in both cells have */
/* moved larger than the cell size ? */
/* Note ci->dmin == cj->dmin */
if (max(ci->sinks.r_cut_max, kernel_gamma * cj->hydro.h_max) +
ci->sinks.dx_max_part + cj->hydro.dx_max_part >
cj->dmin) {
return 1;
}
return 0;
}
/**
* @brief Have star particles in a pair of cells moved too much and require a
* rebuild?
*
* @param ci The first #cell.
* @param cj The second #cell.
*/
__attribute__((always_inline, nonnull)) INLINE static int
cell_need_rebuild_for_black_holes_pair(const struct cell *ci,
const struct cell *cj) {
/* Is the cut-off radius plus the max distance the parts in both cells have */
/* moved larger than the cell size ? */
/* Note ci->dmin == cj->dmin */
if (kernel_gamma * max(ci->black_holes.h_max, cj->hydro.h_max) +
ci->black_holes.dx_max_part + cj->hydro.dx_max_part >
cj->dmin) {
return 1;
}
return 0;
}