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feat(scheduler-core): wire builtin_fcfs as registered default picker (task 2.4)

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Registers builtin_fcfs at scheduler startup and makes it the default
job_pick_plugin, replacing the hardcoded "xce_sched_fcfs" literal in
sched_job_picker() with a fail-loud lookup through sched_resolve_job_picker().
The picker thread now branches legacy job_elect_fn plugins (delegated
unchanged, preserving their self-contained wbuf-driven loop) from native
xce_job_picker_iface_t pickers (driven by a new per-session loop), and the
allocator now calls on_dispatch/on_pend for every picker as Req 1 AC 4
requires. Closes task 2.3's flagged picker/allocator concurrency race with a
mutex on fcfs_plugin_data_t, and adds cancel points to next_job().
This commit is contained in:
Rongsong Shen 2026-08-03 08:51:45 +00:00
parent fcb32a8b30
commit 7ee9a16f53
Signed by: rshen
SSH key fingerprint: SHA256:8Vf2pZ3h6rJa7EhGK+WaAQ9Mta/apZvteW6g9U/WKKk
11 changed files with 1036 additions and 54 deletions
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13
src/scheduler/testsuite/test_picker_fcfs_session.c
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@ -62,6 +62,19 @@ int sched_queue_is_ready(xce_sched_queue_t* q)
int sched_job_is_ready(xce_sched_job_t* j) { return (j != g_not_ready_job); }
/* Task 2.4 added register_builtin_fcfs() (bottom of builtin_fcfs.c), which
* calls plugin_register() (plugin.c, not linked into this white-box TU).
* Stub to satisfy the linker -- this file's tests (task 2.3's session/
* post-allocation hooks) don't exercise registration; see
* test_picker_wiring.c (task 2.4) for coverage against the REAL
* plugin_register(). */
int plugin_register(void* arg1, void* arg2)
{
(void)arg1;
(void)arg2;
return 0;
}
#include "../src/plugins/builtin_fcfs.c"
void setUp(void) { return; }