36bf195890
This allows us to replace includes of cache.h with includes of the much smaller alloc.h in many places. It does mean that we also need to add includes of alloc.h in a number of C files. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
63 lines
1.1 KiB
C
63 lines
1.1 KiB
C
#include "git-compat-util.h"
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#include "alloc.h"
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#include "sigchain.h"
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#define SIGCHAIN_MAX_SIGNALS 32
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struct sigchain_signal {
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sigchain_fun *old;
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int n;
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int alloc;
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};
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static struct sigchain_signal signals[SIGCHAIN_MAX_SIGNALS];
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static void check_signum(int sig)
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{
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if (sig < 1 || sig >= SIGCHAIN_MAX_SIGNALS)
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BUG("signal out of range: %d", sig);
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}
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int sigchain_push(int sig, sigchain_fun f)
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{
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struct sigchain_signal *s = signals + sig;
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check_signum(sig);
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ALLOC_GROW(s->old, s->n + 1, s->alloc);
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s->old[s->n] = signal(sig, f);
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if (s->old[s->n] == SIG_ERR)
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return -1;
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s->n++;
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return 0;
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}
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int sigchain_pop(int sig)
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{
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struct sigchain_signal *s = signals + sig;
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check_signum(sig);
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if (s->n < 1)
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return 0;
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if (signal(sig, s->old[s->n - 1]) == SIG_ERR)
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return -1;
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s->n--;
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return 0;
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}
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void sigchain_push_common(sigchain_fun f)
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{
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sigchain_push(SIGINT, f);
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sigchain_push(SIGHUP, f);
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sigchain_push(SIGTERM, f);
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sigchain_push(SIGQUIT, f);
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sigchain_push(SIGPIPE, f);
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}
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void sigchain_pop_common(void)
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{
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sigchain_pop(SIGPIPE);
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sigchain_pop(SIGQUIT);
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sigchain_pop(SIGTERM);
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sigchain_pop(SIGHUP);
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sigchain_pop(SIGINT);
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}
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