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Implement thread-specific die() routines; use one in start_async().

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This commit is contained in:
Johannes Sixt
2007-11-16 13:46:37 +01:00
committed by Johannes Sixt
parent 4eb0463971
commit 85763c86da
3 changed files with 45 additions and 6 deletions
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32
usage.c
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@@ -34,16 +34,38 @@ static void warn_builtin(const char *warn, va_list params)
vreport("warning: ", warn, params);
}
typedef void (*die_fn_t)(const char *err, va_list params) NORETURN;
static DWORD tls_index;
static void tls_init(void) __attribute__((constructor));
static void tls_init(void)
{
tls_index = TlsAlloc();
}
struct routines {
die_fn_t die_routine;
};
/* If we are in a dlopen()ed .so write to a global variable would segfault
* (ugh), so keep things static. */
static void (*usage_routine)(const char *err) NORETURN = usage_builtin;
static void (*die_routine)(const char *err, va_list params) NORETURN = die_builtin;
static void (*error_routine)(const char *err, va_list params) = error_builtin;
static void (*warn_routine)(const char *err, va_list params) = warn_builtin;
void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN)
{
die_routine = routine;
struct routines *r = TlsGetValue(tls_index);
if (r == NULL) {
/* avoid die()! */
r = calloc(sizeof(*r), 1);
if (r == NULL) {
fprintf(stderr, "cannot allocate thread-local storage");
return;
}
TlsSetValue(tls_index, r);
}
r->die_routine = routine;
}
void usage(const char *err)
@@ -54,9 +76,13 @@ void usage(const char *err)
void die(const char *err, ...)
{
va_list params;
struct routines *r = TlsGetValue(tls_index);
va_start(params, err);
die_routine(err, params);
if (r == NULL || r->die_routine == NULL)
die_builtin(err, params);
else
r->die_routine(err, params);
va_end(params);
}