diff options
| author | Anthony Ramine <[email protected]> | 2013-05-06 20:09:39 +0200 |
|---|---|---|
| committer | Fredrik Gustafsson <[email protected]> | 2013-05-28 12:19:34 +0200 |
| commit | acb8ef5d18cc3976bf580a8e6925cb5641acd401 (patch) | |
| tree | 6118529820acda1f779935cde6c03c935f5a6d1e /erts/emulator | |
| parent | 80c02173c9fc1d76ac1b404a05e2706817a4c308 (diff) | |
| download | otp-acb8ef5d18cc3976bf580a8e6925cb5641acd401.tar.gz otp-acb8ef5d18cc3976bf580a8e6925cb5641acd401.tar.bz2 otp-acb8ef5d18cc3976bf580a8e6925cb5641acd401.zip | |
Fix receive support in erl_eval with a BEAM module
Using the low-level BEAM instructions, we can loop over each message in
the process queue and removes the first message that matches, without
receiving them all to later send them back to itself.
The function prim_eval:'receive'/2 is equivalent to the
following pseudo-code:
'receive'(F, T) ->
RESET MESSAGE QUEUE POINTER,
LOOP:
case PEEK CURRENT MESSAGE WITH TIMEOUT T of
{ok,Msg} ->
case F(Msg) of
nomatch ->
DECREMENT TIMEOUT T,
ADVANCE MESSAGE QUEUE POINTER,
GOTO LOOP;
Result ->
RESET MESSAGE QUEUE POINTER,
Result
end;
timeout ->
RESET MESSAGE QUEUE POINTER,
timeout
end.
To not break Dialyzer and other tools, we use a stub Erlang module which
abstract code is forcefully inserted into prim_inet.erl afterwards
compilation.
Diffstat (limited to 'erts/emulator')
| -rw-r--r-- | erts/emulator/Makefile.in | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in index fb4cde0e76..58e83540e1 100644 --- a/erts/emulator/Makefile.in +++ b/erts/emulator/Makefile.in @@ -559,13 +559,14 @@ GENERATE += $(TTF_DIR)/driver_tab.c # Preloaded code. # # This list must be consistent with PRE_LOADED_MODULES in -# lib/kernel/src/Makefile. +# erts/preloaded/src/Makefile. ifeq ($(TARGET),win32) # On windows the preloaded objects are in a resource object. PRELOAD_OBJ = $(OBJDIR)/beams.$(RES_EXT) PRELOAD_SRC = $(TARGET)/beams.rc $(PRELOAD_SRC): $(ERL_TOP)/erts/preloaded/ebin/otp_ring0.beam \ $(ERL_TOP)/erts/preloaded/ebin/init.beam \ + $(ERL_TOP)/erts/preloaded/ebin/prim_eval.beam \ $(ERL_TOP)/erts/preloaded/ebin/prim_inet.beam \ $(ERL_TOP)/erts/preloaded/ebin/prim_file.beam \ $(ERL_TOP)/erts/preloaded/ebin/zlib.beam \ @@ -579,6 +580,7 @@ PRELOAD_OBJ = $(OBJDIR)/preload.o PRELOAD_SRC = $(TARGET)/preload.c $(PRELOAD_SRC): $(ERL_TOP)/erts/preloaded/ebin/otp_ring0.beam \ $(ERL_TOP)/erts/preloaded/ebin/init.beam \ + $(ERL_TOP)/erts/preloaded/ebin/prim_eval.beam \ $(ERL_TOP)/erts/preloaded/ebin/prim_inet.beam \ $(ERL_TOP)/erts/preloaded/ebin/prim_file.beam \ $(ERL_TOP)/erts/preloaded/ebin/zlib.beam \ |