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* posix_ipc.cc (ipc_mutex_init): Create global object name.

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(ipc_cond_init): Ditto.
	(struct mq_hdr): Add mqh_uname member to store synchronization object
	name.
	(mq_open): Create unique synchronization object name and store in
	mq_hdr->mqh_uname.  Use this name in calls to ipc_mutex_init and
	ipc_cond_init.
This commit is contained in:
Corinna Vinschen
2007-02-15 11:28:46 +00:00
parent 868281075d
commit 93162be554
2 changed files with 36 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
winsup/cygwin/posix_ipc.cc
View File

@@ -90,10 +90,8 @@ static int
ipc_mutex_init (HANDLE *pmtx, const char *name)
{
char buf[CYG_MAX_PATH];
strcpy (buf, "cyg_pmtx");
strcat (buf, name);
for (char *c = buf; c = strchr (c + 1, '\\'); ++c)
*c = '/';
__small_sprintf (buf, "%scyg_pmtx/%s",
wincap.has_terminal_services () ? "Global\\" : "", name);
*pmtx = CreateMutex (&sec_all, FALSE, buf);
if (!*pmtx)
debug_printf ("failed: %E\n");
@@ -135,10 +133,9 @@ static int
ipc_cond_init (HANDLE *pevt, const char *name)
{
char buf[CYG_MAX_PATH];
strcpy (buf, "cyg_pevt");
strcat (buf, name);
for (char *c = buf; c = strchr (c + 1, '\\'); ++c)
*c = '/';
strcpy (buf, wincap.has_terminal_services () ? "Global\\" : "");
__small_sprintf (buf, "%scyg_pevt/%s",
wincap.has_terminal_services () ? "Global\\" : "", name);
*pevt = CreateEvent (&sec_all, TRUE, FALSE, buf);
if (!*pevt)
debug_printf ("failed: %E\n");
@@ -240,28 +237,30 @@ shm_unlink (const char *name)
struct mq_hdr
{
struct mq_attr mqh_attr; /* the queue's attributes */
long mqh_head; /* index of first message */
long mqh_free; /* index of first free message */
long mqh_nwait; /* #threads blocked in mq_receive() */
pid_t mqh_pid; /* nonzero PID if mqh_event set */
struct sigevent mqh_event; /* for mq_notify() */
struct mq_attr mqh_attr; /* the queue's attributes */
long mqh_head; /* index of first message */
long mqh_free; /* index of first free message */
long mqh_nwait; /* #threads blocked in mq_receive() */
pid_t mqh_pid; /* nonzero PID if mqh_event set */
char mqh_uname[20]; /* unique name used to identify synchronization
objects connected to this queue */
struct sigevent mqh_event; /* for mq_notify() */
};
struct msg_hdr
{
long msg_next; /* index of next on linked list */
ssize_t msg_len; /* actual length */
unsigned int msg_prio; /* priority */
long msg_next; /* index of next on linked list */
ssize_t msg_len; /* actual length */
unsigned int msg_prio; /* priority */
};
struct mq_info
{
struct mq_hdr *mqi_hdr; /* start of mmap'ed region */
unsigned long mqi_magic; /* magic number if open */
int mqi_flags; /* flags for this process */
HANDLE mqi_lock; /* mutex lock */
HANDLE mqi_wait; /* and condition variable */
struct mq_hdr *mqi_hdr; /* start of mmap'ed region */
unsigned long mqi_magic; /* magic number if open */
int mqi_flags; /* flags for this process */
HANDLE mqi_lock; /* mutex lock */
HANDLE mqi_wait; /* and condition variable */
};
#define MQI_MAGIC 0x98765432UL
@@ -359,6 +358,7 @@ again:
mqhdr->mqh_attr.mq_curmsgs = 0;
mqhdr->mqh_nwait = 0;
mqhdr->mqh_pid = 0;
__small_sprintf (mqhdr->mqh_uname, "cyg%016X", hash_path_name (0,mqname));
mqhdr->mqh_head = 0;
index = sizeof (struct mq_hdr);
mqhdr->mqh_free = index;
@@ -372,11 +372,11 @@ again:
msghdr->msg_next = 0; /* end of free list */
/* Initialize mutex & condition variable */
i = ipc_mutex_init (&mqinfo->mqi_lock, mqname);
i = ipc_mutex_init (&mqinfo->mqi_lock, mqhdr->mqh_uname);
if (i != 0)
goto pthreaderr;
i = ipc_cond_init (&mqinfo->mqi_wait, mqname);
i = ipc_cond_init (&mqinfo->mqi_wait, mqhdr->mqh_uname);
if (i != 0)
goto pthreaderr;
@@ -432,11 +432,11 @@ exists:
mqinfo->mqi_flags = nonblock;
/* Initialize mutex & condition variable */
i = ipc_mutex_init (&mqinfo->mqi_lock, mqname);
i = ipc_mutex_init (&mqinfo->mqi_lock, mqhdr->mqh_uname);
if (i != 0)
goto pthreaderr;
i = ipc_cond_init (&mqinfo->mqi_wait, mqname);
i = ipc_cond_init (&mqinfo->mqi_wait, mqhdr->mqh_uname);
if (i != 0)
goto pthreaderr;