diff options
| -rw-r--r-- | src/job.c | 123 | ||||
| -rw-r--r-- | src/job.h | 29 |
2 files changed, 60 insertions, 92 deletions
@@ -164,100 +164,47 @@ bool job_is_anchor(Job *j) { return false; } -static bool types_match(JobType a, JobType b, JobType c, JobType d) { - return - (a == c && b == d) || - (a == d && b == c); -} - -int job_type_merge(JobType *a, JobType b) { - if (*a == b) - return 0; - - /* Merging is associative! a merged with b merged with c is - * the same as a merged with c merged with b. */ - - /* Mergeability is transitive! if a can be merged with b and b - * with c then a also with c */ - - /* Also, if a merged with b cannot be merged with c, then - * either a or b cannot be merged with c either */ - - if (types_match(*a, b, JOB_START, JOB_VERIFY_ACTIVE)) - *a = JOB_START; - else if (types_match(*a, b, JOB_START, JOB_RELOAD) || - types_match(*a, b, JOB_START, JOB_RELOAD_OR_START) || - types_match(*a, b, JOB_VERIFY_ACTIVE, JOB_RELOAD_OR_START) || - types_match(*a, b, JOB_RELOAD, JOB_RELOAD_OR_START)) - *a = JOB_RELOAD_OR_START; - else if (types_match(*a, b, JOB_START, JOB_RESTART) || - types_match(*a, b, JOB_START, JOB_TRY_RESTART) || - types_match(*a, b, JOB_VERIFY_ACTIVE, JOB_RESTART) || - types_match(*a, b, JOB_RELOAD, JOB_RESTART) || - types_match(*a, b, JOB_RELOAD_OR_START, JOB_RESTART) || - types_match(*a, b, JOB_RELOAD_OR_START, JOB_TRY_RESTART) || - types_match(*a, b, JOB_RESTART, JOB_TRY_RESTART)) - *a = JOB_RESTART; - else if (types_match(*a, b, JOB_VERIFY_ACTIVE, JOB_RELOAD)) - *a = JOB_RELOAD; - else if (types_match(*a, b, JOB_VERIFY_ACTIVE, JOB_TRY_RESTART) || - types_match(*a, b, JOB_RELOAD, JOB_TRY_RESTART)) - *a = JOB_TRY_RESTART; - else - return -EEXIST; - - return 0; -} - -bool job_type_is_mergeable(JobType a, JobType b) { - return job_type_merge(&a, b) >= 0; -} - -bool job_type_is_superset(JobType a, JobType b) { +/* + * Merging is commutative, so imagine the matrix as symmetric. We store only + * its lower triangle to avoid duplication. We don't store the main diagonal, + * because A merged with A is simply A. + * + * Merging is associative! A merged with B merged with C is the same as + * A merged with C merged with B. + * + * Mergeability is transitive! If A can be merged with B and B with C then + * A also with C. + * + * Also, if A merged with B cannot be merged with C, then either A or B cannot + * be merged with C either. + */ +static const JobType job_merging_table[] = { +/* What \ With * JOB_START JOB_VERIFY_ACTIVE JOB_STOP JOB_RELOAD JOB_RELOAD_OR_START JOB_RESTART JOB_TRY_RESTART */ +/************************************************************************************************************************************/ +/*JOB_START */ +/*JOB_VERIFY_ACTIVE */ JOB_START, +/*JOB_STOP */ -1, -1, +/*JOB_RELOAD */ JOB_RELOAD_OR_START, JOB_RELOAD, -1, +/*JOB_RELOAD_OR_START*/ JOB_RELOAD_OR_START, JOB_RELOAD_OR_START, -1, JOB_RELOAD_OR_START, +/*JOB_RESTART */ JOB_RESTART, JOB_RESTART, -1, JOB_RESTART, JOB_RESTART, +/*JOB_TRY_RESTART */ JOB_RESTART, JOB_TRY_RESTART, -1, JOB_TRY_RESTART, JOB_RESTART, JOB_RESTART, +}; - /* Checks whether operation a is a "superset" of b in its - * actions */ +JobType job_type_lookup_merge(JobType a, JobType b) { + assert_cc(ELEMENTSOF(job_merging_table) == _JOB_TYPE_MAX * (_JOB_TYPE_MAX - 1) / 2); + assert(a >= 0 && a < _JOB_TYPE_MAX); + assert(b >= 0 && b < _JOB_TYPE_MAX); if (a == b) - return true; - - switch (a) { - case JOB_START: - return b == JOB_VERIFY_ACTIVE; - - case JOB_RELOAD: - return - b == JOB_VERIFY_ACTIVE; - - case JOB_RELOAD_OR_START: - return - b == JOB_RELOAD || - b == JOB_START || - b == JOB_VERIFY_ACTIVE; - - case JOB_RESTART: - return - b == JOB_START || - b == JOB_VERIFY_ACTIVE || - b == JOB_RELOAD || - b == JOB_RELOAD_OR_START || - b == JOB_TRY_RESTART; - - case JOB_TRY_RESTART: - return - b == JOB_VERIFY_ACTIVE || - b == JOB_RELOAD; - default: - return false; + return a; + if (a < b) { + JobType tmp = a; + a = b; + b = tmp; } -} - -bool job_type_is_conflicting(JobType a, JobType b) { - assert(a >= 0 && a < _JOB_TYPE_MAX); - assert(b >= 0 && b < _JOB_TYPE_MAX); - return (a == JOB_STOP) != (b == JOB_STOP); + return job_merging_table[(a - 1) * a / 2 + b]; } bool job_type_is_redundant(JobType a, UnitActiveState b) { @@ -24,6 +24,7 @@ #include <stdbool.h> #include <inttypes.h> +#include <errno.h> typedef struct Job Job; typedef struct JobDependency JobDependency; @@ -37,6 +38,7 @@ typedef enum JobResult JobResult; #include "hashmap.h" #include "list.h" +/* Be careful when changing the job types! Adjust job_merging_table[] accordingly! */ enum JobType { JOB_START, /* if a unit does not support being started, we'll just wait until it becomes active */ JOB_VERIFY_ACTIVE, @@ -145,10 +147,29 @@ bool job_is_anchor(Job *j); int job_merge(Job *j, Job *other); -int job_type_merge(JobType *a, JobType b); -bool job_type_is_mergeable(JobType a, JobType b); -bool job_type_is_superset(JobType a, JobType b); -bool job_type_is_conflicting(JobType a, JobType b); +JobType job_type_lookup_merge(JobType a, JobType b); + +static inline int job_type_merge(JobType *a, JobType b) { + JobType t = job_type_lookup_merge(*a, b); + if (t < 0) + return -EEXIST; + *a = t; + return 0; +} + +static inline bool job_type_is_mergeable(JobType a, JobType b) { + return job_type_lookup_merge(a, b) >= 0; +} + +static inline bool job_type_is_conflicting(JobType a, JobType b) { + return !job_type_is_mergeable(a, b); +} + +static inline bool job_type_is_superset(JobType a, JobType b) { + /* Checks whether operation a is a "superset" of b in its actions */ + return a == job_type_lookup_merge(a, b); +} + bool job_type_is_redundant(JobType a, UnitActiveState b); bool job_is_runnable(Job *j); |