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Thanks for your specific explanation!

Thanks!
I know the answer: the above description means under the condition that a read lock has already been held by a thread, if one thread tries to acquire a read lock, another one tries to...

From <<Advanced Programming in the Unix>> section 11.6, it says: Although implementations vary, readerwriter locks usually block additional readers if a lock is already held in read mode and a...

Will memory leak happen if free reader writer lock without first calling pthread_rwlock_destroy?

the code is below and the was run on Solaris 9.

-----------------------------
struct sched_param param;

param.sched_priority = 99;
if(sched_setscheduler(0, SCHED_RR, &param) == -1)
{
...

i want to set the 2006 to a variable. How to do it?

i want to get a substring from a string and used such shell script:
var_year=`expr substr "07132006" 5 4`
echo $var_year

but i got such error message: expr: syntax error. why?

Note: Kshell...

On my solaris 9, its:
lrwxrwxrwx 1 root other 14 Feb 7 12:03 /opt/SUNWspro/bin/CC -> ../prod/bin/CC

So, gmake or make are tools to interpret makefile. The real c/c++ compilor is specified in makefile. for example: in my project makefile, there are such lines:
$(TAG)/%.o: %.c
$(CC) $(CFLAGS)...

shenzhen{bzhu}$ gmake -version
GNU Make version 3.71, by Richard Stallman and Roland McGrath.
Copyright (C) 1988, 89, 90, 91, 92, 93, 94 Free Software Foundation, Inc.
This is free software; see...

I am working on solaris 9. and use gmake to compile and linke c/c++ program.
anybody can tell me the distinguish between gmake and make? :confused:

thanks for your reply.

how to read POSIX? poe six or not?

you shoud first compile your program with -g.
then dbx your exe file.