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Code Issues Releases Activity

Even more of previous

master
Allen Webster 2020-02-19 21:04:52 -08:00
parent 1f2b9c7541
commit 34a968a058
1 changed files with 93 additions and 93 deletions
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186
platform_linux/linux_4ed_functions.cpp
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@ -11,7 +11,7 @@
internal String_Const_u8
system_get_path(Arena* arena, System_Path_Code path_code){
String_Const_u8 result = {};
switch (path_code){
case SystemPath_CurrentDirectory: {
// glibc extension: getcwd allocates its own memory if passed NULL
@ -19,70 +19,70 @@ system_get_path(Arena* arena, System_Path_Code path_code){
u64 working_dir_len = cstring_length(working_dir);
u8 *out = push_array(arena, u8, working_dir_len + 1);
block_copy(out, working_dir, working_dir_len);
// NOTE: 4ed appears to expect a slash on the end.
out[working_dir_len] = '/';
free(working_dir);
result = SCu8(out, working_dir_len + 1);
} break;
case SystemPath_Binary: {
// linux-specific: binary path symlinked at /proc/self/exe
// PATH_MAX is probably good enough...
// read the 'readlink' manpage for some comedy about it being 'broken by design'.
char* buf = push_array(arena, char, PATH_MAX);
ssize_t n = readlink("/proc/self/exe", buf, PATH_MAX);
if(n == -1) {
perror("readlink");
*buf = n = 0;
}
result = string_remove_last_folder(SCu8(buf, n));
} break;
}
return(result);
}
internal String_Const_u8
system_get_canonical(Arena* arena, String_Const_u8 name){
// first remove redundant ../, //, ./ parts
const u8* input = (u8*) strndupa((char*)name.str, name.size);
u8* output = push_array(arena, u8, name.size + 1);
const u8* p = input;
u8* q = output;
while(*p) {
// not a slash - copy char
if(p[0] != '/') {
*q++ = *p++;
continue;
}
// two slashes in a row, skip one.
if(p[1] == '/') {
++p;
}
else if(p[1] == '.') {
// skip "/./" or trailing "/."
if(p[2] == '/' || p[2] == '\0') {
p += 2;
}
// if we encounter "/../" or trailing "/..", remove last directory instead
else if(p[2] == '.' && (p[3] == '/' || p[3] == '\0')) {
while(q > output && *--q != '/'){};
p += 3;
}
else {
*q++ = *p++;
}
@ -91,13 +91,13 @@ system_get_canonical(Arena* arena, String_Const_u8 name){
*q++ = *p++;
}
}
#ifdef INSO_DEBUG
if(name.size != q - output) {
LINUX_FN_DEBUG("[%.*s] -> [%.*s]", (int)name.size, name.str, (int)(q - output), output);
}
#endif
// TODO: use realpath at this point to resolve symlinks?
return SCu8(output, q - output);
}
@ -106,57 +106,57 @@ internal File_List
system_get_file_list(Arena* arena, String_Const_u8 directory){
//LINUX_FN_DEBUG("%.*s", (int)directory.size, directory.str);
File_List result = {};
char* path = strndupa((char*)directory.str, directory.size);
int fd = open(path, O_RDONLY | O_DIRECTORY);
if(fd == -1) {
perror("open");
return result;
}
DIR* dir = fdopendir(fd);
struct dirent* d;
File_Info* head = NULL;
File_Info** fip = &head;
while((d = readdir(dir))) {
const char* name = d->d_name;
// ignore . and ..
if(*name == '.' && (name[1] == '\0' || (name[1] == '.' && name[2] == '\0'))) {
continue;
}
*fip = push_array(arena, File_Info, 1);
(*fip)->file_name = push_u8_stringf(arena, "%.*s", d->d_reclen, name);
struct stat st;
if(fstatat(fd, name, &st, 0) == -1){
perror("fstatat");
}
(*fip)->attributes = linux_file_attributes_from_struct_stat(&st);
fip = &(*fip)->next;
result.count++;
}
closedir(dir);
if(result.count > 0) {
result.infos = fip = push_array(arena, File_Info*, result.count);
for(File_Info* f = head; f; f = f->next) {
*fip++ = f;
}
qsort(result.infos, result.count, sizeof(File_Info*), (__compar_fn_t)&linux_compare_file_infos);
for(u32 i = 0; i < result.count - 1; ++i) {
result.infos[i]->next = result.infos[i+1];
}
result.infos[result.count-1]->next = NULL;
}
return result;
}
@ -209,9 +209,9 @@ internal File_Attributes
system_save_file(Arena* scratch, char* file_name, String_Const_u8 data){
LINUX_FN_DEBUG("%s", file_name);
File_Attributes result = {};
// TODO(inso): should probably put a \n on the end if it's a text file.
int fd = open(file_name, O_WRONLY, O_CREAT);
if (fd != -1) {
int bytes_written = write(fd, data.str, data.size);
@ -225,7 +225,7 @@ system_save_file(Arena* scratch, char* file_name, String_Const_u8 data){
} else {
perror("open");
}
return result;
}
@ -265,7 +265,7 @@ system_wake_up_timer_create(void){
LINUX_FN_DEBUG();
Linux_Object* object = linux_alloc_object(LinuxObjectKind_Timer);
dll_insert(&linuxvars.timer_objects, &object->node);
// NOTE(inso): timers created on-demand to avoid file-descriptor exhaustion.
object->timer.fd = -1;
}
@ -287,23 +287,23 @@ internal void
system_wake_up_timer_set(Plat_Handle handle, u32 time_milliseconds){
//LINUX_FN_DEBUG("%u", time_milliseconds);
Linux_Object* object = handle_to_object(handle);
if (object->kind == LinuxObjectKind_Timer){
if(object->timer.fd == -1) {
object->timer.fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK | TFD_CLOEXEC);
struct epoll_event ev;
ev.events = EPOLLIN | EPOLLET | EPOLLONESHOT;
ev.data.ptr = &object->timer.epoll_tag;
epoll_ctl(linuxvars.epoll, EPOLL_CTL_ADD, object->timer.fd, &ev);
}
struct itimerspec it = {};
it.it_value.tv_sec = time_milliseconds / 1000;
it.it_value.tv_nsec = (time_milliseconds % 1000) * UINT64_C(1000000);
timerfd_settime(object->timer.fd, 0, &it, NULL);
}
}
internal void
@ -358,28 +358,28 @@ system_cli_call(Arena* scratch, char* path, char* script, CLI_Handles* cli_out){
perror("system_cli_call: pipe");
return 0;
}
pid_t child_pid = vfork();
if (child_pid == -1){
perror("system_cli_call: fork");
return 0;
}
enum { PIPE_FD_READ, PIPE_FD_WRITE };
// child
if (child_pid == 0){
close(pipe_fds[PIPE_FD_READ]);
dup2(pipe_fds[PIPE_FD_WRITE], STDOUT_FILENO);
dup2(pipe_fds[PIPE_FD_WRITE], STDERR_FILENO);
if (chdir(path) == -1){
perror("system_cli_call: chdir");
exit(1);
}
char* argv[] = { "sh", "-c", script, NULL };
if (execv("/bin/sh", argv) == -1){
perror("system_cli_call: execv");
}
@ -387,17 +387,17 @@ system_cli_call(Arena* scratch, char* path, char* script, CLI_Handles* cli_out){
}
else{
close(pipe_fds[PIPE_FD_WRITE]);
*(pid_t*)&cli_out->proc = child_pid;
*(int*)&cli_out->out_read = pipe_fds[PIPE_FD_READ];
*(int*)&cli_out->out_write = pipe_fds[PIPE_FD_WRITE];
struct epoll_event e = {};
e.events = EPOLLIN | EPOLLET;
e.data.ptr = &epoll_tag_cli_pipe;
epoll_ctl(linuxvars.epoll, EPOLL_CTL_ADD, pipe_fds[PIPE_FD_READ], &e);
}
return(true);
}
@ -411,16 +411,16 @@ internal b32
system_cli_update_step(CLI_Handles* cli, char* dest, u32 max, u32* amount){
LINUX_FN_DEBUG();
int pipe_read_fd = *(int*)&cli->out_read;
fd_set fds;
FD_ZERO(&fds);
FD_SET(pipe_read_fd, &fds);
struct timeval tv = {};
size_t space_left = max;
char* ptr = dest;
while (space_left > 0 && select(pipe_read_fd + 1, &fds, NULL, NULL, &tv) == 1){
ssize_t num = read(pipe_read_fd, ptr, space_left);
if (num == -1){
@ -433,7 +433,7 @@ system_cli_update_step(CLI_Handles* cli, char* dest, u32 max, u32* amount){
space_left -= num;
}
}
*amount = (ptr - dest);
return((ptr - dest) > 0);
}
@ -443,16 +443,16 @@ system_cli_end_update(CLI_Handles* cli){
LINUX_FN_DEBUG();
pid_t pid = *(pid_t*)&cli->proc;
b32 close_me = false;
int status;
if (pid && waitpid(pid, &status, WNOHANG) > 0){
cli->exit = WEXITSTATUS(status);
close_me = true;
close(*(int*)&cli->out_read);
close(*(int*)&cli->out_write);
}
return(close_me);
}
@ -484,28 +484,28 @@ internal System_Thread
system_thread_launch(Thread_Function* proc, void* ptr){
LINUX_FN_DEBUG();
System_Thread result = {};
Linux_Object* thread_info = linux_alloc_object(LinuxObjectKind_Thread);
thread_info->thread.proc = proc;
thread_info->thread.ptr = ptr;
pthread_attr_t thread_attr;
pthread_attr_init(&thread_attr);
int create_result = pthread_create(
&thread_info->thread.pthread,
&thread_attr,
linux_thread_proc_start,
thread_info);
&thread_info->thread.pthread,
&thread_attr,
linux_thread_proc_start,
thread_info);
pthread_attr_destroy(&thread_attr);
// TODO(andrew): Need to wait for thread to confirm it launched?
if (create_result == 0) {
static_assert(sizeof(Linux_Object*) <= sizeof(System_Thread));
static_assert(sizeof(Linux_Object*) <= sizeof(System_Thread), "Linux_Object doesn't fit inside System_Thread");
*(Linux_Object**)&result = thread_info;
return result;
}
return result;
}
@ -626,31 +626,31 @@ system_condition_variable_free(System_Condition_Variable cv){
internal void*
system_memory_allocate(u64 size, String_Const_u8 location){
static_assert(MEMORY_PREFIX_SIZE >= sizeof(Memory_Annotation_Node));
static_assert(MEMORY_PREFIX_SIZE >= sizeof(Memory_Annotation_Node), "MEMORY_PREFIX_SIZE is not enough to contain Memory_Annotation_Node");
u64 adjusted_size = size + MEMORY_PREFIX_SIZE;
Assert(adjusted_size > size);
const int prot = PROT_READ | PROT_WRITE;
const int flags = MAP_PRIVATE | MAP_ANONYMOUS;
void* result = mmap(NULL, adjusted_size, prot, flags, -1, 0);
if(result == MAP_FAILED) {
perror("mmap");
return NULL;
}
Linux_Memory_Tracker_Node* node = (Linux_Memory_Tracker_Node*)result;
node->location = location;
node->size = size;
pthread_mutex_lock(&linuxvars.memory_tracker_mutex);
zdll_push_back(linuxvars.memory_tracker_head, linuxvars.memory_tracker_tail, node);
linuxvars.memory_tracker_count++;
pthread_mutex_unlock(&linuxvars.memory_tracker_mutex);
return (u8*)result + MEMORY_PREFIX_SIZE;
}
@ -669,12 +669,12 @@ internal void
system_memory_free(void* ptr, u64 size){
u64 adjusted_size = size + MEMORY_PREFIX_SIZE;
Linux_Memory_Tracker_Node* node = (Linux_Memory_Tracker_Node*)((u8*)ptr - MEMORY_PREFIX_SIZE);
pthread_mutex_lock(&linuxvars.memory_tracker_mutex);
zdll_remove(linuxvars.memory_tracker_head, linuxvars.memory_tracker_tail, node);
linuxvars.memory_tracker_count--;
pthread_mutex_unlock(&linuxvars.memory_tracker_mutex);
if(munmap(node, adjusted_size) == -1) {
perror("munmap");
}
@ -683,12 +683,12 @@ system_memory_free(void* ptr, u64 size){
internal Memory_Annotation
system_memory_annotation(Arena* arena){
LINUX_FN_DEBUG();
Memory_Annotation result;
Memory_Annotation_Node** ptr = &result.first;
pthread_mutex_lock(&linuxvars.memory_tracker_mutex);
for(Linux_Memory_Tracker_Node* node = linuxvars.memory_tracker_head; node; node = node->next) {
*ptr = push_array(arena, Memory_Annotation_Node, 1);
(*ptr)->location = node->location;
@ -697,25 +697,25 @@ system_memory_annotation(Arena* arena){
ptr = &(*ptr)->next;
result.count++;
}
pthread_mutex_unlock(&linuxvars.memory_tracker_mutex);
*ptr = NULL;
result.last = CastFromMember(Memory_Annotation_Node, next, ptr);
return result;
}
internal void
system_show_mouse_cursor(i32 show){
LINUX_FN_DEBUG("%d", show);
linuxvars.cursor_show = show;
XDefineCursor(
linuxvars.dpy,
linuxvars.win,
show ? None : linuxvars.hidden_cursor);
linuxvars.dpy,
linuxvars.win,
show ? None : linuxvars.hidden_cursor);
}
internal b32
@ -727,11 +727,11 @@ system_set_fullscreen(b32 full_screen){
internal b32
system_is_fullscreen(void){
b32 result = 0;
// NOTE(inso): This will get the "true" state of fullscreen,
// even if it was toggled outside of 4coder.
// (e.g. super-F11 on some WMs sets fullscreen for any window/program)
Atom type, *prop;
unsigned long nitems, pad;
int fmt;
@ -741,12 +741,12 @@ system_is_fullscreen(void){
0, 32, False, XA_ATOM,
&type, &fmt, &nitems, &pad,
(unsigned char**)&prop);
if(ret == Success && prop){
result = *prop == linuxvars.atom__NET_WM_STATE_FULLSCREEN;
XFree((unsigned char*)prop);
}
return result;
}