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Tue Sep 11 18:15:00 2001 Robert Collins <rbtcollins@hotmail.com>

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* dcrt0.cc (cygwin_finished_initializing): Copy _mtinterf on fork;
        * fork.cc (fork_child): fixup thread-related structures after fork;
        * thread.cc (MTinterface::Init): Initialise the new mutex, condition and semaphore lists.
        (MTinterface::fixup_after_fork): Iterate through each list and fixup the objects.
        (pthread_cond::pthread_cond): Add this to the condition list.
        (pthread_cond::~pthread_cond): Remove this from the condition list.
        (pthread_cond::fixup_after_fork): Recreate as best we can the pre-fork state.
        (pthread_mutex::pthread_mutex): Add this to the mutex list.
        (pthread_mutex::~pthread_mutex): Remove this from the mutex list.
        (pthread_mutex::fixup_after_fork): Recreate as best we can the pre-fork state.
        (semaphore::semaphore): Store the initial value, and add this to the semaphore list.
        (semaphore::~semaphore): Remove this from the semaphore list.
        (semaphore::Post): Increment the current semaphore value.
        (semaphore::TryWait): Decrement the current semaphore value.
        (semaphore::Wait): Ditto.
        (semaphote::fixup_after_fork): Recreate the pre-fork state as best we can.
        * thread.h (pthread_mutex): New members to allow fixup_after_fork.
        (pthread_cond): Ditto.
        (semaphore): Ditto.
        (MTinterface): New list heads for tracking conds and semaphores.
This commit is contained in:
Robert Collins
2001-09-11 08:15:39 +00:00
parent c4b7e16dd9
commit f9229ef74b
5 changed files with 162 additions and 11 deletions
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10
winsup/cygwin/thread.h
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@@ -270,10 +270,12 @@ public:
HANDLE win32_obj_id;
LONG condwaits;
int pshared;
class pthread_mutex * next;
int Lock ();
int TryLock ();
int UnLock ();
void fixup_after_fork ();
pthread_mutex (unsigned short);
pthread_mutex (pthread_mutexattr *);
@@ -299,9 +301,11 @@ public:
/* to allow atomic behaviour for cond_broadcast */
pthread_mutex_t cond_access;
HANDLE win32_obj_id;
class pthread_cond * next;
int TimedWait (DWORD dwMilliseconds);
void BroadCast ();
void Signal ();
void fixup_after_fork ();
pthread_cond (pthread_condattr *);
~pthread_cond ();
@@ -319,10 +323,13 @@ class semaphore:public verifyable_object
{
public:
HANDLE win32_obj_id;
class semaphore * next;
int shared;
long currentvalue;
void Wait ();
void Post ();
int TryWait ();
void fixup_after_fork ();
semaphore (int, unsigned int);
~semaphore ();
@@ -358,8 +365,11 @@ public:
// list of mutex's. USE THREADSAFE INSERTS AND DELETES.
class pthread_mutex * mutexs;
class pthread_cond * conds;
class semaphore * semaphores;
void Init (int);
void fixup_after_fork (void);
MTinterface ():reent_index (0), indexallocated (0), threadcount (1)
{