In the current ongoing effort for sourcemod to fully support 64 bits, we are introducing "virtual address".
# Explanation
Because SourcePawn does not yet support a 64 bits-wide type it's been impossible for any plugins to hold addresses in regular 32-bits wide variable.
A first attempt at solving this issue was made in commit ce1a4dcac0 therein dubbed "PseudoAddress", however this turned out to be an unsatisfactory solution, as any 'high' address if offsetted could turn invalid (or outright be impossible to map).
This leaves us with three alternatives :
- New type
- Convert Address into a handle
- Virtual Address
A new type is the most destructive solution, as it entails breaking every single Address related method. While that solution is still not off the table, we're reserving it as the last attempt should this commit fail.
Converting into a handle type is a good compromise between a brand new type whilst also preserving the Address methods. However, this comes with two issues: the first being that you can no longer offset Address, the second is that we would require authors to free the handle type which will be very confusing. This will likely not be implemented.
# Virtual address
Under a reasonable assumption, we've noted that the average plugin is unlikely to play with more than 4 GB of memory; this shouldn't be too surprising as all valve games were once 32bits and therefore limited to 4GB. Assuming this stays mostly true and a plugin isn't interested with the mapped memory of lesser known modules (like soundlib or matlib), it is fair to assume plugins are unlikely to access more than 4GB of mapped memory. Working with this in mind, we map the memory the plugins are likely to access to our custom virtual address ranges (from 0 to 4Gb, the values of which can fit on 32bits variable). If any memory was missed and plugins were to try an access it later those ranges will be late-mapped to our virtual address ranges until we run out of them.
In order to use virtual addressing, whether on 32 bits or 64 bits. Plugins must now "#include <virtual_address>", as well as use the new SDKCall_VirtualAddress, SDKType_VirtualAddress, LoadAddressFromAddress & StoreAddressToAddress where it's appropriate to.
* Fix pointer to string marshaling in ClientPrefs for x64
* Fix other cases where pointers were formatted with %x
* Fix warnings in ClientPrefs IsAuthIdConnected
* Initial attempt at compiling against tf2_sdk2013
* compilation fix for css
* Switch to AMTL platform arch defines
* Add CBasePlayer forward decl for dods and hl2dm as well
* Update hl2sdk-manifests
* Add dods to CI
* Actually include am-platform.h
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Co-authored-by: Kenzzer <kenzzer@users.noreply.github.com>
Co-authored-by: Nicholas Hastings <nshastings@gmail.com>
* Initial PVKII branch support
* Change PVKII code to 23, DOTA uses 22 in MM
* Bunch more SE_PVKII preprocessor that was missed
* Add some missing SOURCE_ENGINE_PVKII cases
* Update PVKII FireOutput signature for Linux
* Update checkout-deps with 'pvkii'
* Fix FireOutput signature for PVKII, accidentally used one from newer build
* Change PVKII code to 10, and bump others by 1
* Only check against SE_SDK2013 here, like Metamod
* More SE_PVKII preprocessor cleanup
`SDKCall` has existing semantics that a `-1` retval indicates null, so use that and writes an empty string to the buffer.
Consumers can tell the difference between `""` and `NULL` by checking if the return value is `0` or `-1`.
Various minor things done to project files
Updated sample extension project file and updated makefile to the new unified version (more changes likely on the way)
Updated regex project file and makefile
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extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%401971
