Apache Portable Runtime
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Macros | |
#define | APR_FLOCK_SHARED 1 |
#define | APR_FLOCK_EXCLUSIVE 2 |
#define | APR_FLOCK_TYPEMASK 0x000F |
#define | APR_FLOCK_NONBLOCK 0x0010 |
#define APR_FLOCK_EXCLUSIVE 2 |
Exclusive lock. Only one process may hold an exclusive lock at any given time. This is analogous to a "write lock".
#define APR_FLOCK_NONBLOCK 0x0010 |
do not block while acquiring the file lock
#define APR_FLOCK_SHARED 1 |
Shared lock. More than one process or thread can hold a shared lock at any given time. Essentially, this is a "read lock", preventing writers from establishing an exclusive lock.
#define APR_FLOCK_TYPEMASK 0x000F |
mask to extract lock type