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noxos (docs): documented pipes and new process operations (pause/start)

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antifallobst 2023-04-27 13:04:22 +02:00
parent 82228306c8
commit 9e63f336cf
3 changed files with 88 additions and 15 deletions
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46
content/projects/noxos/docs/codebase/proc/pipe.h.md Normal file
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@ -0,0 +1,46 @@
---
title: "pipe.h"
summary: data streams between processes
---
Pipes are data streams between processes.
# `PIPE_MAX_SENDERS` - macro
The maximum amount of processes, which can write data to one pipe.
# `PIPE_STD_STREAM_SIZE` - macro
The size of a pipes stream buffer, in bytes.
# `pipe_T` - struct
| Name | Type | Description |
|----------------|-------------------------------|---------------------------------------------------------|
| stream | stream_T* | The stream, where the pipes data is saved. |
| receiver | process_T* | The process which is allowed to read from the pipe. |
| senders | process_T* [PIPE_MAX_SENDERS] | The processes which are allowed to write to the pipe. |
| senders_bitmap | bitmap_T | Indicates which fields of _senders_ are currently used. |
# `pipe_init(pipe*, receiver*)` - function (void)
Initializes **_pipe_** and allocates a stream for it.
# `pipe_destruct(pipe*)` - function (void)
Destructs **_pipe_** and frees all of its resources.
# `pipe_add_sender(pipe*, sender*)` - function (bool)
Adds **_sender_** to the sender list of **_pipe_**.
Returns if the operation was successful.
# `pipe_remove_sender(pipe*, sender*)` - function (void)
Removes **_sender_** from the sender list of **_pipe_**.
# `pipe_write(pipe*, buffer_in*, n)` - function (uint64_t)
Writes at most **_n_** bytes from **_buffer_in_** into **_pipe_**.
Returns the amount of bytes that were actually written.
If the amount of actually written bytes is smaller than **_n_** all sender processes of **_pipe_** will be _PIPE_OUT blocked_.
If the receiver is _PIPE_IN blocked_ the blocker will be removed.
# `pipe_read(pipe*, buffer_out*, n)` - function (uint64_t)
Reads at most **_n_** bytes from **_buffer_in_** into **_pipe_**.
Returns the amount of bytes that were actually read.
If the amount of actually read bytes is smaller than **_n_** the receiver process of **_pipe_** will be _PIPE_IN blocked_.
If the senders are _PIPE_OUT blocked_ the blockers will be removed.

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content/projects/noxos/docs/codebase/proc/process.h.md
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@ -20,23 +20,32 @@ These are standard pids
- **None** - This pid is invalid, like `NULL` is an invalid pointer - **None** - This pid is invalid, like `NULL` is an invalid pointer
- **Kernel** - The kernels' main process - **Kernel** - The kernels' main process
# `process_blockers_E` - enum
- **PIPE_OUT** - This blocker becomes activated, when the process tries to write to a pipe, but the pipe has not enough space for the data. It becomes deactivated, when the pipe has space to fit the rest of the data.
- **PIPE_IN** - This blocker becomes activated, when the process tries to read from a pipe, but the pipe has not the requested amount of data. It becomes deactivated, when the pipe contains data again.
# `process_T` - struct # `process_T` - struct
| Name | Type | Description | | Name | Type | Description |
|-------------|---------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------| |-------------|---------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------|
| name | char[128] | The processes' name | | name | char[128] | The processes' name |
| id | pid_t | The process-identification number | | id | pid_t | The process-identification number |
| chunk | void* | A pointer to the chunk, where the process is stored in | | chunk | void* | A pointer to the chunk, where the process is stored in |
| chunk_id | uint32_t | The processes id inside of its chunk | | chunk_id | uint32_t | The processes id inside of its chunk |
| page_map | [page_map_T](https://nerdcult.net/projects/noxos/docs/codebase/mm/page_map.h/#page_map_t---struct-page-aligned)* | The processes page map. | | page_map | [page_map_T](https://nerdcult.net/projects/noxos/docs/codebase/mm/page_map.h/#page_map_t---struct-page-aligned)* | The processes page map. |
| executable | [elf_executable_T](https://nerdcult.net/projects/noxos/docs/codebase/drivers/elf/elf.h/#elf_executable_t---struct)* | The processes executable | | executable | [elf_executable_T](https://nerdcult.net/projects/noxos/docs/codebase/drivers/elf/elf.h/#elf_executable_t---struct)* | The processes executable |
| num_threads | uint32_t | The amount of spawned threads, that belong to the process | | fd_array | file_descriptor_array_T* | Contains the open file descriptors of the process. |
| threads | void* | A pointer to the processes' first thread | | stdout | pipe_T* | Pointer to the pipe, where **stdout** writes to. |
| thread_ids | bitmap_T(reference needed) | This bitmap keeps track of the local thread ids the process has | | stdin | pipe_T | The pipe, where **stdin** reads from. |
| parent | [process_T](https://nerdcult.net/projects/noxos/docs/codebase/proc/process.h/#process_t---struct)* | The process, that spawned this process | | stderr | pipe_T* | Pointer to the pipe, where **stderr** writes to. |
| childs | [process_T](https://nerdcult.net/projects/noxos/docs/codebase/proc/process.h/#process_t---struct)* | A pointer to the processes' first child process | | waiting | bitmap_T | A bitmap of process blockers. If this is greater 0 the process is blocked by something. |
| prev | [process_T](https://nerdcult.net/projects/noxos/docs/codebase/proc/process.h/#process_t---struct)* | The previous process | | num_threads | uint32_t | The amount of spawned threads, that belong to the process |
| next | [process_T](https://nerdcult.net/projects/noxos/docs/codebase/proc/process.h/#process_t---struct)* | The next process | | threads | void* | A pointer to the processes' first thread |
| thread_ids | bitmap_T(reference needed) | This bitmap keeps track of the local thread ids the process has |
| parent | [process_T](https://nerdcult.net/projects/noxos/docs/codebase/proc/process.h/#process_t---struct)* | The process, that spawned this process |
| childs | [process_T](https://nerdcult.net/projects/noxos/docs/codebase/proc/process.h/#process_t---struct)* | A pointer to the processes' first child process |
| prev | [process_T](https://nerdcult.net/projects/noxos/docs/codebase/proc/process.h/#process_t---struct)* | The previous process |
| next | [process_T](https://nerdcult.net/projects/noxos/docs/codebase/proc/process.h/#process_t---struct)* | The next process |
# `process_kernel_spawn(executable)` - function (void) # `process_kernel_spawn(executable)` - function (void)
@ -56,6 +65,18 @@ If it finds one it returns it, else it returns [THREAD_ID_INVALID](https://nerdc
# `process_clear_thread_id(process, id)` - function (void) # `process_clear_thread_id(process, id)` - function (void)
Frees the thread **_id_** and makes it request-able again. Frees the thread **_id_** and makes it request-able again.
# `process_pause_pid(pid)` - function (void)
Resolves the pids process and performs `process_pause` on it.
# `process_pause(process)` - function (void)
Pauses **_process_** and all of its threads.
# `process_start_pid(pid)` - function (void)
Resolves the pids process and performs `process_start` on it.
# `process_start(process)` - function (void)
Starts **_process_** and all of its threads.
# `process_kill_pid(pid)` - function (void) # `process_kill_pid(pid)` - function (void)
Resolves the pids process and performs `process_kill` on it. Resolves the pids process and performs `process_kill` on it.

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content/projects/noxos/docs/codebase/proc/scheduler.h.md
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@ -63,6 +63,12 @@ Pauses and unregisters **_thread_**.
#### `scheduler_register_process(process)` - function (pid_t) #### `scheduler_register_process(process)` - function (pid_t)
Reqisters **_process_** and returns its pid. Reqisters **_process_** and returns its pid.
#### `scheduler_pause_process(process)` - function (void)
Pauses **_process_** and its threads.
#### `scheduler_start_process(process)` - function (void)
Starts **_process_** and its threads.
#### `scheduler_kill_process(process)` - function (void) #### `scheduler_kill_process(process)` - function (void)
Kills **_process_** and its threads and childs. Kills **_process_** and its threads and childs.