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linux file loading / saving working (with questionable threading)

master
insofaras 2016-02-23 19:18:37 +00:00
parent 654e2ab8e1
commit c1b0521e81
1 changed files with 309 additions and 27 deletions
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336
linux_4ed.cpp
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@ -57,6 +57,32 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <pthread.h>
#include <signal.h>
struct Linux_Semaphore {
pthread_mutex_t mutex;
pthread_cond_t cond;
};
struct Linux_Semaphore_Handle {
pthread_mutex_t *mutex_p;
pthread_cond_t *cond_p;
};
struct Thread_Context{
u32 job_id;
b32 running;
Work_Queue *queue;
u32 id;
pthread_t handle;
};
struct Thread_Group{
Thread_Context *threads;
i32 count;
};
struct Linux_Vars{
Display *XDisplay;
@ -79,6 +105,11 @@ struct Linux_Vars{
void *app_code;
void *custom;
Thread_Memory *thread_memory;
Thread_Group groups[THREAD_GROUP_COUNT];
Linux_Semaphore thread_locks[THREAD_GROUP_COUNT];
Linux_Semaphore locks[LOCK_COUNT];
Plat_Settings settings;
System_Functions *system;
@ -99,6 +130,8 @@ struct Linux_Vars{
#define FPS 60
#define frame_useconds (1000000 / FPS)
#define DBG_FN do { fprintf(stderr, "Fn called: %s\n", __PRETTY_FUNCTION__); } while(0)
globalvar Linux_Vars linuxvars;
globalvar Application_Memory memory_vars;
globalvar Exchange exchange_vars;
@ -328,6 +361,7 @@ Sys_Post_Clipboard_Sig(system_post_clipboard){
Sys_CLI_Call_Sig(system_cli_call){
// TODO(allen): Implement
DBG_FN;
AllowLocal(path);
AllowLocal(script_name);
AllowLocal(cli_out);
@ -335,11 +369,13 @@ Sys_CLI_Call_Sig(system_cli_call){
Sys_CLI_Begin_Update_Sig(system_cli_begin_update){
// TODO(allen): Implement
DBG_FN;
AllowLocal(cli);
}
Sys_CLI_Update_Step_Sig(system_cli_update_step){
// TODO(allen): Implement
DBG_FN;
AllowLocal(cli);
AllowLocal(dest);
AllowLocal(max);
@ -348,31 +384,156 @@ Sys_CLI_Update_Step_Sig(system_cli_update_step){
Sys_CLI_End_Update_Sig(system_cli_end_update){
// TODO(allen): Implement
DBG_FN;
AllowLocal(cli);
}
Sys_Post_Job_Sig(system_post_job){
// TODO(allen): Implement
AllowLocal(group_id);
AllowLocal(job);
static_assert(sizeof(Plat_Handle) >= sizeof(Linux_Semaphore_Handle), "Plat_Handle not big enough");
internal Plat_Handle
LinuxSemToHandle(Linux_Semaphore* sem){
Linux_Semaphore_Handle h = { &sem->mutex, &sem->cond };
return *(Plat_Handle*)&h;
}
Sys_Cancel_Job_Sig(system_cancel_job){
internal void*
ThreadProc(void* arg){
Thread_Context *thread = (Thread_Context*)arg;
Work_Queue *queue = thread->queue;
for (;;){
u32 read_index = queue->read_position;
u32 write_index = queue->write_position;
if (read_index != write_index){
u32 next_read_index = (read_index + 1) % JOB_ID_WRAP;
u32 safe_read_index =
__sync_val_compare_and_swap(&queue->read_position,
read_index, next_read_index);
if (safe_read_index == read_index){
Full_Job_Data *full_job = queue->jobs + (safe_read_index % QUEUE_WRAP);
// NOTE(allen): This is interlocked so that it plays nice
// with the cancel job routine, which may try to cancel this job
// at the same time that we try to run it
i32 safe_running_thread =
__sync_val_compare_and_swap(&full_job->running_thread,
THREAD_NOT_ASSIGNED, thread->id);
if (safe_running_thread == THREAD_NOT_ASSIGNED){
thread->job_id = full_job->id;
thread->running = 1;
Thread_Memory *thread_memory = 0;
// TODO(allen): remove memory_request
if (full_job->job.memory_request != 0){
thread_memory = linuxvars.thread_memory + thread->id - 1;
if (thread_memory->size < full_job->job.memory_request){
if (thread_memory->data){
LinuxFreeMemory(thread_memory->data);
}
i32 new_size = LargeRoundUp(full_job->job.memory_request, Kbytes(4));
thread_memory->data = LinuxGetMemory(new_size);
thread_memory->size = new_size;
}
}
full_job->job.callback(linuxvars.system, thread, thread_memory,
&exchange_vars.thread, full_job->job.data);
full_job->running_thread = 0;
thread->running = 0;
}
}
}
else{
Linux_Semaphore_Handle* h = (Linux_Semaphore_Handle*)&(queue->semaphore);
pthread_cond_wait(h->cond_p, h->mutex_p);
}
}
}
Sys_Post_Job_Sig(system_post_job){
// TODO(allen): Implement
DBG_FN;
AllowLocal(group_id);
AllowLocal(job_id);
AllowLocal(job);
Work_Queue *queue = exchange_vars.thread.queues + group_id;
Assert((queue->write_position + 1) % QUEUE_WRAP != queue->read_position % QUEUE_WRAP);
b32 success = 0;
u32 result = 0;
while (!success){
u32 write_index = queue->write_position;
u32 next_write_index = (write_index + 1) % JOB_ID_WRAP;
u32 safe_write_index =
__sync_val_compare_and_swap(&queue->write_position,
write_index, next_write_index);
if (safe_write_index == write_index){
result = write_index;
write_index = write_index % QUEUE_WRAP;
queue->jobs[write_index].job = job;
queue->jobs[write_index].running_thread = THREAD_NOT_ASSIGNED;
queue->jobs[write_index].id = result;
success = 1;
}
}
Linux_Semaphore_Handle* h = (Linux_Semaphore_Handle*)&(queue->semaphore);
pthread_cond_broadcast(h->cond_p);
return result;
}
Sys_Acquire_Lock_Sig(system_acquire_lock){
// TODO(allen): Implement
AllowLocal(id);
// printf("%s: id: %d\n", __PRETTY_FUNCTION__, id);
pthread_mutex_lock(&linuxvars.locks[id].mutex);
//pthread_cond_wait(&linuxvars.locks[id].cond, &linuxvars.locks[id].mutex);
pthread_mutex_unlock(&linuxvars.locks[id].mutex);
}
Sys_Release_Lock_Sig(system_release_lock){
// TODO(allen): Implement
AllowLocal(id);
//printf("%s: id: %d\n", __PRETTY_FUNCTION__, id);
pthread_mutex_lock(&linuxvars.locks[id].mutex);
pthread_cond_broadcast(&linuxvars.locks[id].cond);
pthread_mutex_unlock(&linuxvars.locks[id].mutex);
}
Sys_Cancel_Job_Sig(system_cancel_job){
DBG_FN;
AllowLocal(group_id);
AllowLocal(job_id);
Work_Queue *queue = exchange_vars.thread.queues + group_id;
Thread_Group *group = linuxvars.groups + group_id;
u32 job_index;
u32 thread_id;
Full_Job_Data *full_job;
Thread_Context *thread;
job_index = job_id % QUEUE_WRAP;
full_job = queue->jobs + job_index;
Assert(full_job->id == job_id);
thread_id =
__sync_val_compare_and_swap(&full_job->running_thread,
THREAD_NOT_ASSIGNED, 0);
if (thread_id != THREAD_NOT_ASSIGNED){
system_acquire_lock(CANCEL_LOCK0 + thread_id - 1);
thread = group->threads + thread_id - 1;
pthread_kill(thread->handle, SIGINT); //NOTE(inso) SIGKILL if you really want it to die.
pthread_create(&thread->handle, NULL, &ThreadProc, thread);
system_release_lock(CANCEL_LOCK0 + thread_id - 1);
thread->running = 0;
}
}
Sys_Grow_Thread_Memory_Sig(system_grow_thread_memory){
void *old_data;
i32 old_size, new_size;
@ -402,6 +563,7 @@ INTERNAL_Sys_Sentinel_Sig(internal_sentinel){
INTERNAL_Sys_Get_Thread_States_Sig(internal_get_thread_states){
// TODO(allen): Implement
DBG_FN;
AllowLocal(id);
AllowLocal(running);
AllowLocal(pending);
@ -502,10 +664,44 @@ out:
internal
Sys_Save_File_Sig(system_save_file){
b32 result = 0;
// TODO(allen): Implement
AllowLocal(filename);
AllowLocal(data);
AllowLocal(size);
DBG_FN;
const size_t save_fsz = strlen(filename);
const char tmp_end[] = ".4ed.XXXXXX";
char* tmp_fname = (char*) alloca(save_fsz + sizeof(tmp_end));
memcpy(tmp_fname, filename, save_fsz);
memcpy(tmp_fname + save_fsz, tmp_end, sizeof(tmp_end));
int tmp_fd = mkstemp(tmp_fname);
if(tmp_fd == -1){
perror("system_save_file: mkstemp");
return result;
}
size_t remaining = size;
do {
ssize_t written = write(tmp_fd, data, size);
if(written == -1){
if(errno == EINTR){
continue;
} else {
perror("system_save_file: write");
unlink(tmp_fname);
return result;
}
} else {
remaining -= written;
}
} while(remaining);
if(rename(tmp_fname, filename) == -1){
perror("system_save_file: rename");
unlink(tmp_fname);
return result;
}
result = 1;
return(result);
}
@ -1060,7 +1256,8 @@ InitializeXInput(Display *dpy, Window XWindow)
PointerMotionMask |
FocusChangeMask |
StructureNotifyMask |
MappingNotify
MappingNotify |
ExposureMask
);
result.input_method = XOpenIM(dpy, 0, 0, 0);
@ -1230,7 +1427,38 @@ main(int argc, char **argv)
#endif
// TODO(allen): Setup background threads and locks
Thread_Context background[4] = {};
linuxvars.groups[BACKGROUND_THREADS].threads = background;
linuxvars.groups[BACKGROUND_THREADS].count = ArrayCount(background);
Thread_Memory thread_memory[ArrayCount(background)];
linuxvars.thread_memory = thread_memory;
pthread_mutex_init(&linuxvars.thread_locks[BACKGROUND_THREADS].mutex, NULL);
pthread_cond_init(&linuxvars.thread_locks[BACKGROUND_THREADS].cond, NULL);
exchange_vars.thread.queues[BACKGROUND_THREADS].semaphore =
LinuxSemToHandle(&linuxvars.thread_locks[BACKGROUND_THREADS]);
for(i32 i = 0; i < linuxvars.groups[BACKGROUND_THREADS].count; ++i){
Thread_Context *thread = linuxvars.groups[BACKGROUND_THREADS].threads + i;
thread->id = i + 1;
Thread_Memory *memory = linuxvars.thread_memory + i;
*memory = {};
memory->id = thread->id;
thread->queue = &exchange_vars.thread.queues[BACKGROUND_THREADS];
pthread_create(&thread->handle, NULL, &ThreadProc, thread);
}
Assert(linuxvars.locks);
for(i32 i = 0; i < LOCK_COUNT; ++i){
pthread_mutex_init(&linuxvars.locks[i].mutex, NULL);
pthread_cond_init(&linuxvars.locks[i].cond, NULL);
}
LinuxLoadRenderCode();
linuxvars.target.max = Mbytes(1);
linuxvars.target.push_buffer = (byte*)system_get_memory(linuxvars.target.max);
@ -1400,17 +1628,11 @@ main(int argc, char **argv)
push_key(0, 0, 0, &mods, is_hold);
}
}
linuxvars.redraw = 1;
}break;
case KeyRelease: {
linuxvars.redraw = 1;
}break;
case MotionNotify: {
linuxvars.mouse_data.x = Event.xmotion.x;
linuxvars.mouse_data.y = Event.xmotion.y;
linuxvars.redraw = 1;
}break;
case ButtonPress: {
@ -1424,7 +1646,6 @@ main(int argc, char **argv)
linuxvars.mouse_data.right_button = 1;
} break;
}
linuxvars.redraw = 1;
}break;
case ButtonRelease: {
@ -1438,24 +1659,20 @@ main(int argc, char **argv)
linuxvars.mouse_data.right_button = 0;
} break;
}
linuxvars.redraw = 1;
}break;
case EnterNotify: {
linuxvars.mouse_data.out_of_window = 0;
linuxvars.redraw = 1;
}break;
case LeaveNotify: {
linuxvars.mouse_data.out_of_window = 1;
linuxvars.redraw = 1;
}break;
case FocusIn:
case FocusOut: {
linuxvars.mouse_data.left_button = 0;
linuxvars.mouse_data.right_button = 0;
linuxvars.redraw = 1;
}break;
case ConfigureNotify: {
@ -1559,6 +1776,10 @@ main(int argc, char **argv)
}
}
}break;
case Expose: {
linuxvars.redraw = 1;
}break;
}
PrevEvent = Event;
@ -1582,6 +1803,11 @@ main(int argc, char **argv)
mouse = linuxvars.mouse_data;
result.mouse_cursor_type = APP_MOUSE_CURSOR_DEFAULT;
if(__sync_bool_compare_and_swap(&exchange_vars.thread.force_redraw, 1, 0)){
linuxvars.redraw = 1;
}
result.redraw = linuxvars.redraw;
result.lctrl_lalt_is_altgr = 0;
@ -1613,6 +1839,62 @@ main(int argc, char **argv)
linuxvars.mouse_data.left_button_released = 0;
linuxvars.mouse_data.right_button_pressed = 0;
linuxvars.mouse_data.right_button_released = 0;
ProfileStart(OS_file_process);
{
File_Slot *file;
int d = 0;
for (file = exchange_vars.file.active.next;
file != &exchange_vars.file.active;
file = file->next){
++d;
if (file->flags & FEx_Save){
Assert((file->flags & FEx_Request) == 0);
file->flags &= (~FEx_Save);
if (system_save_file(file->filename, (char*)file->data, file->size)){
file->flags |= FEx_Save_Complete;
}
else{
file->flags |= FEx_Save_Failed;
}
}
if (file->flags & FEx_Request){
Assert((file->flags & FEx_Save) == 0);
file->flags &= (~FEx_Request);
Data sysfile =
system_load_file(file->filename);
if (sysfile.data == 0){
file->flags |= FEx_Not_Exist;
}
else{
file->flags |= FEx_Ready;
file->data = sysfile.data;
file->size = sysfile.size;
}
}
}
Assert(d == exchange_vars.file.num_active);
for (file = exchange_vars.file.free_list.next;
file != &exchange_vars.file.free_list;
file = file->next){
if (file->data){
system_free_memory(file->data);
}
}
if (exchange_vars.file.free_list.next != &exchange_vars.file.free_list){
ex__insert_range(exchange_vars.file.free_list.next, exchange_vars.file.free_list.prev,
&exchange_vars.file.available);
}
ex__check(&exchange_vars.file);
}
ProfileEnd(OS_file_process);
}
}