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unify static TLS support, make use of gcc __thread attribute if available

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1797 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-09-10 23:57:10 +00:00
parent 3d122d0fee
commit 9b0ab39b1c
7 changed files with 59 additions and 32 deletions
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35
src/pulsecore/thread.h
View file

@ -26,6 +26,12 @@
***/
#include <pulse/def.h>
#include <pulsecore/once.h>
/* We have to include config.h here (for the __tls stuff), which sucks */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
typedef struct pa_thread pa_thread;
@ -48,8 +54,6 @@ void pa_tls_free(pa_tls *t);
void * pa_tls_get(pa_tls *t);
void *pa_tls_set(pa_tls *t, void *userdata);
/* To make use of the static TLS stuff you have to include once.h, as well */
#define PA_STATIC_TLS_DECLARE(name, free_cb) \
static struct { \
pa_once once; \
@ -61,7 +65,7 @@ void *pa_tls_set(pa_tls *t, void *userdata);
static void name##_tls_init(void) { \
name##_tls.tls = pa_tls_new(free_cb); \
} \
static inline pa_tls* name##_tls_get(void) { \
static inline pa_tls* name##_tls_obj(void) { \
pa_run_once(&name##_tls.once, name##_tls_init); \
return name##_tls.tls; \
} \
@ -70,8 +74,33 @@ void *pa_tls_set(pa_tls *t, void *userdata);
if (name##_tls.tls) \
pa_tls_free(name##_tls.tls); \
} \
static inline void* name##_tls_get(void) { \
return pa_tls_get(name##_tls_obj()); \
} \
static inline void* name##_tls_set(void *p) { \
return pa_tls_set(name##_tls_obj(), p); \
} \
struct __stupid_useless_struct_to_allow_trailing_semicolon
#ifdef HAVE_TLS_BUILTIN
/* An optimized version of the above that requires no dynamic
* allocation if the compiler supports __thread */
#define PA_STATIC_TLS_DECLARE_NO_FREE(name) \
static __thread void *name##_tls; \
static inline void* name##_tls_get(void) { \
return name##_tls; \
} \
static inline void* name##_tls_set(void *p) { \
void *r = name##_tls; \
name##_tls = p; \
return r; \
} \
struct __stupid_useless_struct_to_allow_trailing_semicolon
#else
#define PA_STATIC_TLS_DECLARE_NO_FREE(name) PA_STATIC_TLS_DECLARE(name, NULL)
#endif
#define PA_STATIC_TLS_GET(name) (name##_tls_get())
#define PA_STATIC_TLS_SET(name, p) (name##_tls_set(p))
#endif