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ACE
6.3.4
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Make a memory pool that is based on mmap(2). This implementation allows memory to be shared between processes.
More...
#include <MMAP_Memory_Pool.h>


Public Types | |
| typedef ACE_MMAP_Memory_Pool_Options | OPTIONS |
Public Types inherited from ACE_Event_Handler | |
| enum | { LO_PRIORITY = 0, HI_PRIORITY = 10, NULL_MASK = 0, READ_MASK = (1 << 0), WRITE_MASK = (1 << 1), EXCEPT_MASK = (1 << 2), ACCEPT_MASK = (1 << 3), CONNECT_MASK = (1 << 4), TIMER_MASK = (1 << 5), QOS_MASK = (1 << 6), GROUP_QOS_MASK = (1 << 7), SIGNAL_MASK = (1 << 8), ALL_EVENTS_MASK, RWE_MASK, DONT_CALL = (1 << 9) } |
| enum | { ACE_EVENT_HANDLER_NOT_RESUMED = -1, ACE_REACTOR_RESUMES_HANDLER = 0, ACE_APPLICATION_RESUMES_HANDLER } |
| typedef long | Reference_Count |
| Reference count type. More... | |
Public Member Functions | |
| ACE_MMAP_Memory_Pool (const ACE_TCHAR *backing_store_name=0, const OPTIONS *options=0) | |
| Initialize the pool. More... | |
| virtual | ~ACE_MMAP_Memory_Pool (void) |
| Destructor. More... | |
| virtual void * | init_acquire (size_t nbytes, size_t &rounded_bytes, int &first_time) |
| Ask system for initial chunk of shared memory. More... | |
| virtual void * | acquire (size_t nbytes, size_t &rounded_bytes) |
| virtual int | release (int destroy=1) |
| Instruct the memory pool to release all of its resources. More... | |
| virtual int | sync (size_t len, int flags=MS_SYNC) |
| virtual int | sync (int flags=MS_SYNC) |
| virtual int | sync (void *addr, size_t len, int flags=MS_SYNC) |
| Sync the memory region to the backing store starting at addr. More... | |
| virtual int | protect (size_t len, int prot=PROT_RDWR) |
| virtual int | protect (int prot=PROT_RDWR) |
| virtual int | protect (void *addr, size_t len, int prot=PROT_RDWR) |
| virtual int | seh_selector (void *) |
| virtual int | remap (void *addr) |
| virtual void * | base_addr (void) const |
| Return the base address of this memory pool. More... | |
| virtual void | dump (void) const |
| Dump the state of an object. More... | |
| ACE_Mem_Map const & | mmap (void) const |
| Get reference to underlying ACE_Mem_Map object. More... | |
| ACE_Mem_Map & | mmap (void) |
| Get reference to underlying ACE_Mem_Map object. More... | |
Public Member Functions inherited from ACE_Event_Handler | |
| virtual | ~ACE_Event_Handler (void) |
| Destructor is virtual to enable proper cleanup. More... | |
| virtual ACE_HANDLE | get_handle (void) const |
| Get the I/O handle. More... | |
| virtual void | set_handle (ACE_HANDLE) |
| Set the I/O handle. More... | |
| virtual int | priority (void) const |
| virtual void | priority (int priority) |
| Set the priority of the Event_Handler. More... | |
| virtual int | handle_input (ACE_HANDLE fd=ACE_INVALID_HANDLE) |
| Called when input events occur (e.g., connection or data). More... | |
| virtual int | handle_output (ACE_HANDLE fd=ACE_INVALID_HANDLE) |
| virtual int | handle_exception (ACE_HANDLE fd=ACE_INVALID_HANDLE) |
| Called when an exceptional events occur (e.g., SIGURG). More... | |
| virtual int | handle_timeout (const ACE_Time_Value ¤t_time, const void *act=0) |
| virtual int | handle_exit (ACE_Process *) |
| Called when a process exits. More... | |
| virtual int | handle_close (ACE_HANDLE handle, ACE_Reactor_Mask close_mask) |
| virtual int | handle_signal (int signum, siginfo_t *=0, ucontext_t *=0) |
| virtual int | resume_handler (void) |
| virtual int | handle_qos (ACE_HANDLE=ACE_INVALID_HANDLE) |
| virtual int | handle_group_qos (ACE_HANDLE=ACE_INVALID_HANDLE) |
| virtual void | reactor (ACE_Reactor *reactor) |
| Set the event demultiplexors. More... | |
| virtual ACE_Reactor * | reactor (void) const |
| Get the event demultiplexors. More... | |
| virtual ACE_Reactor_Timer_Interface * | reactor_timer_interface (void) const |
| Get only the reactor's timer related interface. More... | |
| virtual Reference_Count | add_reference (void) |
| Increment reference count on the handler. More... | |
| virtual Reference_Count | remove_reference (void) |
| Decrement reference count on the handler. More... | |
| Reference_Counting_Policy & | reference_counting_policy (void) |
| Current Reference_Counting_Policy. More... | |
Public Attributes | |
| ACE_ALLOC_HOOK_DECLARE | |
| Declare the dynamic allocation hooks. More... | |
Protected Member Functions | |
| virtual size_t | round_up (size_t nbytes) |
| virtual int | commit_backing_store_name (size_t rounded_bytes, size_t &map_size) |
| virtual int | map_file (size_t map_size) |
| Memory map the file up to map_size bytes. More... | |
Protected Member Functions inherited from ACE_Event_Handler | |
| ACE_Event_Handler (ACE_Reactor *=0, int priority=ACE_Event_Handler::LO_PRIORITY) | |
| Force ACE_Event_Handler to be an abstract base class. More... | |
Protected Attributes | |
| ACE_Mem_Map | mmap_ |
| Memory-mapping object. More... | |
| void * | base_addr_ |
| int | use_fixed_addr_ |
Must we use the base_addr_ or can we let mmap(2) select it? More... | |
| int | flags_ |
| Flags passed into ACE_OS::mmap(). More... | |
| bool | write_each_page_ |
| size_t | minimum_bytes_ |
| What the minimum bytes of the initial segment should be. More... | |
| ACE_TCHAR | backing_store_name_ [MAXPATHLEN+1] |
| Name of the backing store where the shared memory pool is kept. More... | |
| bool | guess_on_fault_ |
| LPSECURITY_ATTRIBUTES | sa_ |
| Security attributes object, only used on NT. More... | |
| mode_t | file_mode_ |
| Protection mode for mmaped file. More... | |
| bool | install_signal_handler_ |
| Should we install a signal handler. More... | |
Protected Attributes inherited from ACE_Event_Handler | |
| Atomic_Reference_Count | reference_count_ |
| Reference count. More... | |
Additional Inherited Members | |
Static Public Member Functions inherited from ACE_Event_Handler | |
| static ACE_THR_FUNC_RETURN | read_adapter (void *event_handler) |
| static int | register_stdin_handler (ACE_Event_Handler *eh, ACE_Reactor *reactor, ACE_Thread_Manager *thr_mgr, int flags=THR_DETACHED) |
| static int | remove_stdin_handler (ACE_Reactor *reactor, ACE_Thread_Manager *thr_mgr) |
| Performs the inverse of the register_stdin_handler() method. More... | |
Protected Types inherited from ACE_Event_Handler | |
| typedef ACE_Atomic_Op< ACE_SYNCH_MUTEX, Reference_Count > | Atomic_Reference_Count |
| Typedef for implementation of reference counting. More... | |
Make a memory pool that is based on mmap(2). This implementation allows memory to be shared between processes.
| ACE_MMAP_Memory_Pool::ACE_MMAP_Memory_Pool | ( | const ACE_TCHAR * | backing_store_name = 0, |
| const OPTIONS * | options = 0 |
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Initialize the pool.
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Destructor.
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Acquire at least nbytes from the memory pool. rounded_bytes is the actual number of bytes allocated. Also acquires an internal semaphore that ensures proper serialization of ACE_MMAP_Memory_Pool initialization across processes.
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Return the base address of this memory pool.
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Compute the new map_size of the backing store and commit the memory.
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Dump the state of an object.
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Ask system for initial chunk of shared memory.
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Memory map the file up to map_size bytes.
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Get reference to underlying ACE_Mem_Map object.
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Get reference to underlying ACE_Mem_Map object.
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Change the protection of the pages of the mapped region to prot starting at this->base_addr_ up to len bytes. If len == -1 then change protection of all pages in the mapped region.
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Change the protection of all the pages of the mapped region to prot starting at this->base_addr_.
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Change the protection of the pages of the mapped region to prot starting at addr up to len bytes.
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Instruct the memory pool to release all of its resources.
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Try to extend the virtual address space so that addr is now covered by the address mapping. The method succeeds and returns 0 if the backing store has adequate memory to cover this address. Otherwise, it returns -1. This method is typically called by a UNIX signal handler for SIGSEGV or a Win32 structured exception when another process has grown the backing store (and its mapping) and our process now incurs a fault because our mapping isn't in range (yet).
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Implement the algorithm for rounding up the request to an appropriate chunksize.
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Win32 Structural exception selector. The return value decides how to handle memory pool related structural exceptions. Returns 1, 0, or , -1.
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Sync the memory region to the backing store starting at this->base_addr_.
Reimplemented in ACE_Lite_MMAP_Memory_Pool.
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Sync the memory region to the backing store starting at this->base_addr_. Will sync as much as the backing file allows.
Reimplemented in ACE_Lite_MMAP_Memory_Pool.
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Sync the memory region to the backing store starting at addr.
Sync len bytes of the memory region to the backing store starting at <addr_>.
Reimplemented in ACE_Lite_MMAP_Memory_Pool.
| ACE_MMAP_Memory_Pool::ACE_ALLOC_HOOK_DECLARE |
Declare the dynamic allocation hooks.
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Name of the backing store where the shared memory pool is kept.
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Base of mapped region. If this has the value of 0 then the OS is free to select any address to map the file, otherwise this value is what the OS must try to use to mmap the file.
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Protection mode for mmaped file.
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Flags passed into ACE_OS::mmap().
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Try to remap without knowing the faulting address. This parameter is ignored on platforms that know the faulting address (UNIX with SI_ADDR and Win32).
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Should we install a signal handler.
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What the minimum bytes of the initial segment should be.
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Memory-mapping object.
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Security attributes object, only used on NT.
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Must we use the base_addr_ or can we let mmap(2) select it?
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Should we write a byte to each page to forceably allocate memory for this backing store?
1.8.9.1