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* exceptions.cc (call_handler): Use new muto linked list to look for all

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potential mutos owned by suspended thread.  Clear waiting threads while thread
is stopped.
(proc_subproc): Clarify debugging output.
* sync.h (class muto): Add 'next' field.
(new_muto): Keep linked list alive.
This commit is contained in:
Christopher Faylor
2000-02-24 19:54:01 +00:00
parent 4bc3b73cfd
commit d3bda1df95
5 changed files with 36 additions and 12 deletions
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12
winsup/cygwin/sync.h
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@ -20,6 +20,7 @@ class muto
HANDLE bruteforce; /* event handle used to control waiting for lock. */
DWORD tid; /* Thread Id of lock owner. */
public:
class muto *next;
void *operator new (size_t, void *p) {return p;}
void *operator new (size_t) {return ::new muto; }
void operator delete (void *) {;} /* can't handle allocated mutos
@ -27,7 +28,7 @@ public:
/* This simple constructor is used for cases where no bruteforce
event handling is required. */
muto(): sync(0), visits(0), waiters(-1), bruteforce(0), tid(0) {;}
muto(): sync(0), visits(0), waiters(-1), bruteforce(0), tid(0), next (0) {;}
/* A more complicated constructor. */
muto(int inh, const char *name);
~muto ();
@ -40,11 +41,14 @@ public:
int unstable () {return !tid && (sync || waiters >= 0);}
};
extern muto muto_start;
/* Use a statically allocated buffer as the storage for a muto */
#define new_muto(__inh, __name) \
({ \
static NO_COPY char __mbuf[sizeof(class muto) + 100] = {0}; \
muto *m; \
m = new (__mbuf) muto ((__inh), (__name)); \
m; \
muto *m = muto_start.next; \
muto_start.next = new (__mbuf) muto ((__inh), (__name)); \
muto_start.next->next = m; \
muto_start.next; \
})