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In non-blocking recv functions in libmux and libdraw,

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distinguish between "cannot receive without blocking"
and "EOF on connection".

In libmux, do not elect async guys muxers, so that
synchronous RPC calls run in the main event loop
(e.g., in eresized) do not get stuck.

Fixes problem reported by Lu Xuxiao, namely that
jpg etc. would spin at 100% cpu usage.
This commit is contained in:
rsc
2006-11-04 18:46:00 +00:00
parent d3864abaee
commit 3a19470202
7 changed files with 88 additions and 61 deletions
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9
include/mux.h
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@@ -19,6 +19,7 @@ struct Muxrpc
uint tag;
void *p;
int waiting;
int async;
};
struct Mux
@@ -27,7 +28,7 @@ struct Mux
uint maxtag;
int (*send)(Mux*, void*);
void *(*recv)(Mux*);
void *(*nbrecv)(Mux*);
int (*nbrecv)(Mux*, void**);
int (*gettag)(Mux*, void*);
int (*settag)(Mux*, void*, uint);
void *aux; /* for private use by client */
@@ -52,18 +53,18 @@ void muxinit(Mux*);
void* muxrpc(Mux*, void*);
void muxprocs(Mux*);
Muxrpc* muxrpcstart(Mux*, void*);
void* muxrpccanfinish(Muxrpc*);
int muxrpccanfinish(Muxrpc*, void**);
/* private */
int _muxsend(Mux*, void*);
void* _muxrecv(Mux*, int);
int _muxrecv(Mux*, int, void**);
void _muxsendproc(void*);
void _muxrecvproc(void*);
Muxqueue *_muxqalloc(void);
int _muxqsend(Muxqueue*, void*);
void *_muxqrecv(Muxqueue*);
void _muxqhangup(Muxqueue*);
void *_muxnbqrecv(Muxqueue*);
int _muxnbqrecv(Muxqueue*, void**);
#if defined(__cplusplus)
}