Revision 61be1e1f9eb2822799e581d912a22636a2220058 authored by Junio C Hamano on 05 April 2024, 18:00:12 UTC, committed by Junio C Hamano on 05 April 2024, 18:00:12 UTC
The pack-bitmap machinery learned to write pseudo-merge bitmaps, which act as imaginary octopus merges covering un-bitmapped reference tips. This enhances bitmap coverage, and thus, performance, for repositories with many references using bitmaps. * tb/pseudo-merge-reachability-bitmap: (24 commits) t/perf: implement performace tests for pseudo-merge bitmaps pseudo-merge: implement support for finding existing merges ewah: `bitmap_equals_ewah()` pack-bitmap: extra trace2 information pack-bitmap.c: use pseudo-merges during traversal t/test-lib-functions.sh: support `--date` in `test_commit_bulk()` pack-bitmap: implement test helpers for pseudo-merge ewah: implement `ewah_bitmap_popcount()` pseudo-merge: implement support for reading pseudo-merge commits pack-bitmap.c: read pseudo-merge extension pseudo-merge: scaffolding for reads pack-bitmap: extract `read_bitmap()` function pack-bitmap-write.c: write pseudo-merge table pack-bitmap-write.c: select pseudo-merge commits pseudo-merge: implement support for selecting pseudo-merge commits pack-bitmap: make `bitmap_writer_push_bitmapped_commit()` public pack-bitmap: implement `bitmap_writer_has_bitmapped_object_id()` pack-bitmap-write: support storing pseudo-merge commits pseudo-merge.ch: initial commit pack-bitmap: move some initialization to `bitmap_writer_init()` ...
sigchain.c
#include "git-compat-util.h"
#include "sigchain.h"
#define SIGCHAIN_MAX_SIGNALS 32
struct sigchain_signal {
sigchain_fun *old;
int n;
int alloc;
};
static struct sigchain_signal signals[SIGCHAIN_MAX_SIGNALS];
static void check_signum(int sig)
{
if (sig < 1 || sig >= SIGCHAIN_MAX_SIGNALS)
BUG("signal out of range: %d", sig);
}
int sigchain_push(int sig, sigchain_fun f)
{
struct sigchain_signal *s = signals + sig;
check_signum(sig);
ALLOC_GROW(s->old, s->n + 1, s->alloc);
s->old[s->n] = signal(sig, f);
if (s->old[s->n] == SIG_ERR)
return -1;
s->n++;
return 0;
}
int sigchain_pop(int sig)
{
struct sigchain_signal *s = signals + sig;
check_signum(sig);
if (s->n < 1)
return 0;
if (signal(sig, s->old[s->n - 1]) == SIG_ERR)
return -1;
s->n--;
return 0;
}
void sigchain_push_common(sigchain_fun f)
{
sigchain_push(SIGINT, f);
sigchain_push(SIGHUP, f);
sigchain_push(SIGTERM, f);
sigchain_push(SIGQUIT, f);
sigchain_push(SIGPIPE, f);
}
void sigchain_pop_common(void)
{
sigchain_pop(SIGPIPE);
sigchain_pop(SIGQUIT);
sigchain_pop(SIGTERM);
sigchain_pop(SIGHUP);
sigchain_pop(SIGINT);
}
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