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memcached_increment, memcached_decrement,
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memcached_increment_with_initial, memcached_decrement_with_initial - Manipulate
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C Client Library for memcached (libmemcached, -lmemcached)
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#include <memcached.h>
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memcached_increment (memcached_st *ptr,
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const char *key, size_t key_length,
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memcached_decrement (memcached_st *ptr,
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const char *key, size_t key_length,
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memcached_increment_with_initial (memcached_st *ptr,
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memcached_decrement_with_initial (memcached_st *ptr,
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memcached_increment_by_key (memcached_st *ptr,
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const char *master_key, size_t master_key_length,
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const char *key, size_t key_length,
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memcached_decrement_by_key (memcached_st *ptr,
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const char *master_key, size_t master_key_length,
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const char *key, size_t key_length,
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memcached_increment_with_initial_by_key (memcached_st *ptr,
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const char *master_key,
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size_t master_key_length,
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memcached_decrement_with_initial_by_key (memcached_st *ptr,
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const char *master_key,
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size_t master_key_length,
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memcached(1) servers have the ability to increment and decrement keys
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(overflow and underflow are not detected). This gives you the ability to use
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memcached to generate shared sequences of values.
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memcached_increment() takes a key and keylength and increments the value by
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the offset passed to it. The value is then returned via the unsigned int
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value pointer you pass to it.
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memcached_decrement() takes a key and keylength and decrements the value by
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the offset passed to it. The value is then returned via the unsigned int
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value pointer you pass to it.
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memcached_increment_with_initial() takes a key and keylength and increments
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the value by the offset passed to it. If the object specified by key does
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not exist, one of two things may happen: If the expiration value is
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MEMCACHED_EXPIRATION_NOT_ADD, the operation will fail. For all other
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expiration values, the operation will succeed by seeding the value for that
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key with a initial value to expire with the provided expiration time. The
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flags will be set to zero.The value is then returned via the unsigned int
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value pointer you pass to it.
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memcached_decrement_with_initial() takes a key and keylength and decrements
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the value by the offset passed to it. If the object specified by key does
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not exist, one of two things may happen: If the expiration value is
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MEMCACHED_EXPIRATION_NOT_ADD, the operation will fail. For all other
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expiration values, the operation will succeed by seeding the value for that
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key with a initial value to expire with the provided expiration time. The
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flags will be set to zero.The value is then returned via the unsigned int
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value pointer you pass to it.
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memcached_increment_by_key(), memcached_decrement_by_key(),
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memcached_increment_with_initial_by_key(), and
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memcached_decrement_with_initial_by_key() are master key equivalents of the
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A value of type C<memcached_return_t> is returned.
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On success that value will be C<MEMCACHED_SUCCESS>.
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Use memcached_strerror() to translate this value to a printable string.
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To find out more information please check:
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L<https://launchpad.net/libmemcached>
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Brian Aker, E<lt>brian@tangent.orgE<gt>
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memcached(1) libmemcached(3) memcached_strerror(3)