diff options
Diffstat (limited to 'nss/lib/ssl/sslmutex.h')
-rw-r--r-- | nss/lib/ssl/sslmutex.h | 58 |
1 files changed, 28 insertions, 30 deletions
diff --git a/nss/lib/ssl/sslmutex.h b/nss/lib/ssl/sslmutex.h index d374a88..7611148 100644 --- a/nss/lib/ssl/sslmutex.h +++ b/nss/lib/ssl/sslmutex.h @@ -4,20 +4,20 @@ #ifndef __SSLMUTEX_H_ #define __SSLMUTEX_H_ 1 -/* What SSL really wants is portable process-shared unnamed mutexes in +/* What SSL really wants is portable process-shared unnamed mutexes in * shared memory, that have the property that if the process that holds - * them dies, they are released automatically, and that (unlike fcntl - * record locking) lock to the thread, not to the process. - * NSPR doesn't provide that. - * Windows has mutexes that meet that description, but they're not portable. - * POSIX mutexes are not automatically released when the holder dies, - * and other processes/threads cannot release the mutex on behalf of the - * dead holder. - * POSIX semaphores can be used to accomplish this on systems that implement - * process-shared unnamed POSIX semaphores, because a watchdog thread can - * discover and release semaphores that were held by a dead process. - * On systems that do not support process-shared POSIX unnamed semaphores, - * they can be emulated using pipes. + * them dies, they are released automatically, and that (unlike fcntl + * record locking) lock to the thread, not to the process. + * NSPR doesn't provide that. + * Windows has mutexes that meet that description, but they're not portable. + * POSIX mutexes are not automatically released when the holder dies, + * and other processes/threads cannot release the mutex on behalf of the + * dead holder. + * POSIX semaphores can be used to accomplish this on systems that implement + * process-shared unnamed POSIX semaphores, because a watchdog thread can + * discover and release semaphores that were held by a dead process. + * On systems that do not support process-shared POSIX unnamed semaphores, + * they can be emulated using pipes. * The performance cost of doing that is not yet measured. * * So, this API looks a lot like POSIX pthread mutexes. @@ -34,8 +34,7 @@ #include <wtypes.h> -typedef struct -{ +typedef struct { PRBool isMultiProcess; #ifdef WINNT /* on WINNT we need both the PRLock and the Win32 mutex for fibers */ @@ -43,25 +42,25 @@ typedef struct #else union { #endif - PRLock* sslLock; + PRLock *sslLock; HANDLE sslMutx; } u; } sslMutex; -typedef int sslPID; +typedef int sslPID; #elif defined(LINUX) || defined(AIX) || defined(BEOS) || defined(BSDI) || (defined(NETBSD) && __NetBSD_Version__ < 500000000) || defined(OPENBSD) #include <sys/types.h> #include "prtypes.h" -typedef struct { +typedef struct { PRBool isMultiProcess; union { - PRLock* sslLock; + PRLock *sslLock; struct { - int mPipes[3]; - PRInt32 nWaiters; + int mPipes[3]; + PRInt32 nWaiters; } pipeStr; } u; } sslMutex; @@ -70,15 +69,14 @@ typedef pid_t sslPID; /* other types of unix, except OS X */ #elif defined(XP_UNIX) && !defined(DARWIN) -#include <sys/types.h> /* for pid_t */ -#include <semaphore.h> /* for sem_t, and sem_* functions */ +#include <sys/types.h> /* for pid_t */ +#include <semaphore.h> /* for sem_t, and sem_* functions */ -typedef struct -{ +typedef struct { PRBool isMultiProcess; union { - PRLock* sslLock; - sem_t sem; + PRLock *sslLock; + sem_t sem; } u; } sslMutex; @@ -88,10 +86,10 @@ typedef pid_t sslPID; /* what platform is this ?? */ -typedef struct { +typedef struct { PRBool isMultiProcess; union { - PRLock* sslLock; + PRLock *sslLock; /* include cross-process locking mechanism here */ } u; } sslMutex; @@ -111,7 +109,7 @@ SEC_BEGIN_PROTOS extern SECStatus sslMutex_Init(sslMutex *sem, int shared); /* If processLocal is set to true, then just free resources which are *only* associated - * with the current process. Leave any shared resources (including the state of + * with the current process. Leave any shared resources (including the state of * shared memory) intact. */ extern SECStatus sslMutex_Destroy(sslMutex *sem, PRBool processLocal); |