diff options
author | Josh Haberman <jhaberman@gmail.com> | 2011-03-20 13:13:51 -0700 |
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committer | Josh Haberman <jhaberman@gmail.com> | 2011-03-20 13:13:51 -0700 |
commit | 8ef6873e0e14309a1715a252a650bab0ae1a33ef (patch) | |
tree | a9f81f9fa3ee24b923310cef964c1cbe1bf47a19 /src/upb_msg.h | |
parent | 37e1c3102be15f1e57805e828993156e3492d764 (diff) |
upb_stream: all callbacks registered ahead-of-time.
This is a significant change to the upb_stream
protocol, and should hopefully be the last
significant change.
All callbacks are now registered ahead-of-time
instead of having delegated callbacks registered
at runtime, which makes it much easier to
aggressively optimize ahead-of-time (like with a
JIT).
Other impacts of this change:
- You no longer need to have loaded descriptor.proto
as a upb_def to load other descriptors! This means
the special-case code we used for bootstrapping is
no longer necessary, and we no longer need to link
the descriptor for descriptor.proto into upb.
- A client can now register any upb_value as what
will be delivered to their value callback, not
just a upb_fielddef*. This should allow for other
clients to get more bang out of the streaming
decoder.
This change unfortunately causes a bit of a performance
regression -- I think largely due to highly
suboptimal code that GCC generates when structs
are returned by value. See:
http://blog.reverberate.org/2011/03/19/when-a-compilers-slow-code-actually-bites-you/
On the other hand, once we have a JIT this should
no longer matter.
Performance numbers:
plain.parsestream_googlemessage1.upb_table: 374 -> 396 (5.88)
plain.parsestream_googlemessage2.upb_table: 616 -> 449 (-27.11)
plain.parsetostruct_googlemessage1.upb_table_byref: 268 -> 269 (0.37)
plain.parsetostruct_googlemessage1.upb_table_byval: 215 -> 204 (-5.12)
plain.parsetostruct_googlemessage2.upb_table_byref: 307 -> 281 (-8.47)
plain.parsetostruct_googlemessage2.upb_table_byval: 297 -> 272 (-8.42)
omitfp.parsestream_googlemessage1.upb_table: 423 -> 410 (-3.07)
omitfp.parsestream_googlemessage2.upb_table: 679 -> 483 (-28.87)
omitfp.parsetostruct_googlemessage1.upb_table_byref: 287 -> 282 (-1.74)
omitfp.parsetostruct_googlemessage1.upb_table_byval: 226 -> 219 (-3.10)
omitfp.parsetostruct_googlemessage2.upb_table_byref: 315 -> 298 (-5.40)
omitfp.parsetostruct_googlemessage2.upb_table_byval: 297 -> 287 (-3.37)
Diffstat (limited to 'src/upb_msg.h')
-rw-r--r-- | src/upb_msg.h | 31 |
1 files changed, 10 insertions, 21 deletions
diff --git a/src/upb_msg.h b/src/upb_msg.h index fd5750f..4895c4b 100644 --- a/src/upb_msg.h +++ b/src/upb_msg.h @@ -17,8 +17,7 @@ #ifndef UPB_MSG_H #define UPB_MSG_H -#include "upb.h" -#include "upb_def.h" +#include "upb_stream.h" #include <stdlib.h> #ifdef __cplusplus @@ -274,26 +273,16 @@ INLINE void upb_msg_clear(upb_msg *msg, upb_msgdef *md) { memset(msg->data, 0, md->set_flags_bytes); } -// A non-resumable upb_src that pushes the current contents of the message to -// the given handlers. +// Registers handlers for populating a msg for the given upb_msgdef. +// The upb_msg itself must be passed as the param to the src. +void upb_msg_reghandlers(upb_handlers *h, upb_msgdef *md); + +// Registers handlers that are suitable for populating a msg of *any* +// upb_msgdef ("dynamic" handlers). May be slower than upb_msg_reghandlers(). +void upb_msg_regdhandlers(upb_handlers *h); + void upb_msg_runhandlers(upb_msg *msg, upb_msgdef *md, upb_handlers *h, - upb_status *status); - -typedef struct { - upb_msg *msg; - upb_msgdef *msgdef; -} upb_msgpopulator_frame; - -typedef struct { - upb_msgpopulator_frame *top, *limit; - upb_status status; - upb_msgpopulator_frame stack[UPB_MAX_NESTING]; -} upb_msgpopulator; - -void upb_msgpopulator_init(upb_msgpopulator *p); -void upb_msgpopulator_uninit(upb_msgpopulator *p); -void upb_msgpopulator_reset(upb_msgpopulator *p, upb_msg *m, upb_msgdef *md); -void upb_msgpopulator_register_handlers(upb_msgpopulator *p, upb_handlers *h); + void *closure, upb_status *status); #ifdef __cplusplus } /* extern "C" */ |