ACE
6.3.1
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Helper class for MMAP Memory Pool constructor options. More...
#include <MMAP_Memory_Pool.h>
Public Types | |
enum | { FIRSTCALL_FIXED = 0, ALWAYS_FIXED = 1, NEVER_FIXED = 2 } |
Public Member Functions | |
ACE_MMAP_Memory_Pool_Options (const void *base_addr=ACE_DEFAULT_BASE_ADDR, int use_fixed_addr=ALWAYS_FIXED, bool write_each_page=true, size_t minimum_bytes=0, u_int flags=0, bool guess_on_fault=true, LPSECURITY_ATTRIBUTES sa=0, mode_t file_mode=ACE_DEFAULT_FILE_PERMS, bool unique_=false, bool install_signal_handler=true) | |
Constructor. More... | |
Public Attributes | |
const void * | base_addr_ |
Base address of the memory-mapped backing store. More... | |
int | use_fixed_addr_ |
bool | write_each_page_ |
size_t | minimum_bytes_ |
What the minimim bytes of the initial segment should be. More... | |
u_int | flags_ |
Any special flags that need to be used for mmap . More... | |
bool | guess_on_fault_ |
LPSECURITY_ATTRIBUTES | sa_ |
Pointer to a security attributes object. Only used on NT. More... | |
mode_t | file_mode_ |
File mode for mmaped file, if it is created. More... | |
bool | unique_ |
Do we want an unique backing store name? More... | |
bool | install_signal_handler_ |
Should we install a signal handler. More... | |
Private Member Functions | |
ACE_MMAP_Memory_Pool_Options (const ACE_MMAP_Memory_Pool_Options &) | |
ACE_MMAP_Memory_Pool_Options & | operator= (const ACE_MMAP_Memory_Pool_Options &) |
Helper class for MMAP Memory Pool constructor options.
This should be a nested class, but that breaks too many compilers.
anonymous enum |
ACE_MMAP_Memory_Pool_Options::ACE_MMAP_Memory_Pool_Options | ( | const void * | base_addr = ACE_DEFAULT_BASE_ADDR , |
int | use_fixed_addr = ALWAYS_FIXED , |
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bool | write_each_page = true , |
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size_t | minimum_bytes = 0 , |
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u_int | flags = 0 , |
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bool | guess_on_fault = true , |
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LPSECURITY_ATTRIBUTES | sa = 0 , |
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mode_t | file_mode = ACE_DEFAULT_FILE_PERMS , |
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bool | unique_ = false , |
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bool | install_signal_handler = true |
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) |
Constructor.
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private |
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private |
const void* ACE_MMAP_Memory_Pool_Options::base_addr_ |
Base address of the memory-mapped backing store.
mode_t ACE_MMAP_Memory_Pool_Options::file_mode_ |
File mode for mmaped file, if it is created.
u_int ACE_MMAP_Memory_Pool_Options::flags_ |
Any special flags that need to be used for mmap
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bool ACE_MMAP_Memory_Pool_Options::guess_on_fault_ |
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).
bool ACE_MMAP_Memory_Pool_Options::install_signal_handler_ |
Should we install a signal handler.
size_t ACE_MMAP_Memory_Pool_Options::minimum_bytes_ |
What the minimim bytes of the initial segment should be.
LPSECURITY_ATTRIBUTES ACE_MMAP_Memory_Pool_Options::sa_ |
Pointer to a security attributes object. Only used on NT.
bool ACE_MMAP_Memory_Pool_Options::unique_ |
Do we want an unique backing store name?
int ACE_MMAP_Memory_Pool_Options::use_fixed_addr_ |
Determines whether we set base_addr_
or if mmap(2) selects it FIRSTCALL_FIXED The base address from the first call to mmap will be used for subsequent calls to mmap ALWAYS_FIXED The base address specified in base_addr will be used in all calls to mmap. NEVER_FIXED The base address will be selected by the OS for each call to mmap. Caution should be used with this mode since a call that requires the backing store to grow may change pointers that are cached by the application.
bool ACE_MMAP_Memory_Pool_Options::write_each_page_ |
Should each page be written eagerly to avoid surprises later on?