IOP OS: Difference between revisions
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Hallowizer (talk | contribs) Removed redirect to IOS Tag: Removed redirect |
Hallowizer (talk | contribs) added interrupts and threads |
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'''IOP OS''' is a set of functions in [[IOS]]'s networking code that convert [[Revolution OS]] calls to IOS [[IOS/Syscalls|syscalls]]; for example, OSAlloc is implemented as a call to IOS_Alloc. | '''IOP OS''' is a set of functions in [[IOS]]'s networking code that convert [[Revolution OS]] calls to IOS [[IOS/Syscalls|syscalls]]; for example, OSAlloc is implemented as a call to IOS_Alloc. | ||
== Toggling interrupts == | |||
Disabling interrupts is simulated by locking a mutex implemented as a message queue and changing the current thread priority to 0x38. While this does not completely prevent concurrent execution within the module,{{check}} it is enough for most uses of <code>OSDisableInterrupts</code>. | |||
== Threads == | |||
Threads are implemented as a proxy to [[IOS/Kernel#Threads|IOS threads]]. Because of this, <code>OSThreadQueue</code> is only used for suspended queues. | |||
<pre> | |||
struct OSThread { | |||
int threadId; | |||
int priority; | |||
void *threadSpecific; | |||
struct OSThread *next; | |||
} | |||
struct OSThreadQueue { | |||
struct OSThread *head; | |||
struct OSThread *tail; | |||
} | |||
</pre> | |||
Revision as of 22:55, 16 June 2022
IOP OS is a set of functions in IOS's networking code that convert Revolution OS calls to IOS syscalls; for example, OSAlloc is implemented as a call to IOS_Alloc.
Toggling interrupts
Disabling interrupts is simulated by locking a mutex implemented as a message queue and changing the current thread priority to 0x38. While this does not completely prevent concurrent execution within the module,[check] it is enough for most uses of OSDisableInterrupts.
Threads
Threads are implemented as a proxy to IOS threads. Because of this, OSThreadQueue is only used for suspended queues.
struct OSThread {
int threadId;
int priority;
void *threadSpecific;
struct OSThread *next;
}
struct OSThreadQueue {
struct OSThread *head;
struct OSThread *tail;
}