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Merge branch 'main' of gitlab.ibr.cs.tu-bs.de:vss/teaching/ws25/v_bsb2/stubsmi

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Eggert Jung
2026-02-06 23:09:43 +01:00
parent ce87f48f41 598f97cd78
commit 4418419c7b
31 changed files with 402 additions and 3388 deletions
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39
kernel/sync/message.h
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@@ -3,42 +3,13 @@
#include "../types.h"
struct Message {
const size_t pid; ///< Sender Thread ID of message
int sender; ///< Sender Thread ID of message
const uintptr_t sbuffer; ///< Send buffer
const size_t ssize; ///< Send buffer size
uintptr_t sbuffer; ///< Send buffer
size_t ssize; ///< Send buffer size
const uintptr_t rbuffer; ///< Receive buffer
const size_t rsize; ///< Receive buffer size
uintptr_t rbuffer; ///< Receive buffer
size_t rsize; ///< Receive buffer size
Message *queue_link = nullptr; ///< Next message in the message queue
/*! \brief Constructor
* \param pid Sender Thread ID of message
* \param sbuffer Send buffer
* \param ssize Send buffer size
* \param rbuffer Receive buffer
* \param rsize Receive buffer size
*/
explicit Message(int pid, uintptr_t sbuffer = 0, size_t ssize = 0,
uintptr_t rbuffer = 0, size_t rsize = 0)
: pid(pid),
sbuffer(sbuffer),
ssize(ssize),
rbuffer(rbuffer),
rsize(rsize) {}
/*! \brief Helper to retrieve (and remove) a message from the queue
* \param pid Thread id of message
* \param queue Queue with message
* \return Pointer to message or nullptr
*/
static Message *dequeueByPID(size_t pid, Queue<Message> &queue) {
for (Message *m : queue) {
if (m->pid == pid) {
return queue.remove(m);
}
}
return nullptr;
}
};

6
kernel/sync/semaphore.h
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@@ -24,16 +24,16 @@ class Thread;
class Semaphore {
// Prevent copies and assignments
Semaphore(const Semaphore&) = delete;
Semaphore(Semaphore&&) = delete;
Semaphore& operator=(const Semaphore&) = delete;
Queue<Thread> waiting;
public:
/*! \brief Constructor; initialized the counter with provided value `c`
* \param c Initial counter value
/*! \param init Initial counter value
*/
explicit Semaphore(unsigned c = 0) : counter(c) {}
unsigned counter;
bool used;
bool used;
/*! \brief Wait for access to the critical area.
*
* Enter/decrement/wait operation: If the counter is greater than 0, then