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Diffstat (limited to 'innobase/include/sync0ipm.h')
-rw-r--r-- | innobase/include/sync0ipm.h | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/innobase/include/sync0ipm.h b/innobase/include/sync0ipm.h deleted file mode 100644 index 3244a6d26de..00000000000 --- a/innobase/include/sync0ipm.h +++ /dev/null @@ -1,113 +0,0 @@ -/****************************************************** -A fast mutex for interprocess synchronization. -mutex_t can be used only within single process, -but ip mutex also between processes. - -(c) 1995 Innobase Oy - -Created 9/30/1995 Heikki Tuuri -*******************************************************/ - -#ifndef sync0ipm_h -#define sync0ipm_h - -#include "univ.i" -#include "os0sync.h" -#include "sync0sync.h" - -typedef struct ip_mutex_hdl_struct ip_mutex_hdl_t; -typedef struct ip_mutex_struct ip_mutex_t; - -/* NOTE! The structure appears here only for the compiler to -know its size. Do not use its fields directly! -The structure used in a fast implementation of -an interprocess mutex. */ - -struct ip_mutex_struct { - mutex_t mutex; /* Ordinary mutex struct */ - ulint waiters; /* This field is set to 1 if - there may be waiters */ -}; - -/* The performance of the ip mutex in NT depends on how often -a thread has to suspend itself waiting for the ip mutex -to become free. The following variable counts system calls -involved. */ - -extern ulint ip_mutex_system_call_count; - -/********************************************************************** -Creates, or rather, initializes -an ip mutex object in a specified shared memory location (which must be -appropriately aligned). The ip mutex is initialized in the reset state. -NOTE! Explicit destroying of the ip mutex with ip_mutex_free -is not recommended -as the mutex resides in shared memory and we cannot make sure that -no process is currently accessing it. Therefore just use -ip_mutex_close to free the operating system event and mutex. */ - -ulint -ip_mutex_create( -/*============*/ - /* out: 0 if succeed */ - ip_mutex_t* ip_mutex, /* in: pointer to shared memory */ - char* name, /* in: name of the ip mutex */ - ip_mutex_hdl_t** handle); /* out, own: handle to the - created mutex; handle exists - in the private address space of - the calling process */ -/********************************************************************** -NOTE! Using this function is not recommended. See the note -on ip_mutex_create. Destroys an ip mutex */ - -void -ip_mutex_free( -/*==========*/ - ip_mutex_hdl_t* handle); /* in, own: ip mutex handle */ -/********************************************************************** -Opens an ip mutex object in a specified shared memory location. -Explicit closing of the ip mutex with ip_mutex_close is necessary to -free the operating system event and mutex created, and the handle. */ - -ulint -ip_mutex_open( -/*==========*/ - /* out: 0 if succeed */ - ip_mutex_t* ip_mutex, /* in: pointer to shared memory */ - char* name, /* in: name of the ip mutex */ - ip_mutex_hdl_t** handle); /* out, own: handle to the - opened mutex */ -/********************************************************************** -Closes an ip mutex. */ - -void -ip_mutex_close( -/*===========*/ - ip_mutex_hdl_t* handle); /* in, own: ip mutex handle */ -/****************************************************************** -Reserves an ip mutex. */ -UNIV_INLINE -ulint -ip_mutex_enter( -/*===========*/ - /* out: 0 if success, - SYNC_TIME_EXCEEDED if timeout */ - ip_mutex_hdl_t* ip_mutex_hdl, /* in: pointer to ip mutex handle */ - ulint time); /* in: maximum time to wait, in - microseconds, or - SYNC_INFINITE_TIME */ -/****************************************************************** -Releases an ip mutex. */ -UNIV_INLINE -void -ip_mutex_exit( -/*==========*/ - ip_mutex_hdl_t* ip_mutex_hdl); /* in: pointer to ip mutex handle */ - - - -#ifndef UNIV_NONINL -#include "sync0ipm.ic" -#endif - -#endif |