forked from 0ad/0ad
101 lines
2.0 KiB
C++
101 lines
2.0 KiB
C++
#include "precompiled.h"
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#include <map>
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#include <string>
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#include "lib/lib.h"
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#include "lib/res/file/file.h"
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#include <fam.h>
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static FAMConnection fc;
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// trool; -1 = init failed and all operations will be aborted silently.
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// this is so that each dir_* call doesn't complain if the system's
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// FAM is broken or unavailable.
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static int initialized = 0;
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static std::map<intptr_t, std::string> dirs;
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// for atexit
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static void fam_deinit()
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{
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FAMClose(&fc);
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}
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LibError dir_add_watch(const char* const n_full_path, intptr_t* const watch)
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{
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// init already failed; don't try again or complain
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if(initialized == -1)
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return ERR_FAIL; // NOWARN
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if(!initialized)
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{
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// success
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if(FAMOpen2(&fc, "lib_res") == 0)
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{
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initialized = 1;
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atexit(fam_deinit);
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}
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else
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{
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initialized = -1;
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DISPLAY_ERROR(L"Error initializing FAM; hotloading will be disabled");
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return ERR_FAIL; // NOWARN
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}
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}
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FAMRequest req;
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if(FAMMonitorDirectory(&fc, n_full_path, &req, (void*)0) < 0)
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{
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*watch = -1;
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debug_warn("res_watch_dir failed!");
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WARN_RETURN(ERR_FAIL); // no way of getting error code?
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}
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*watch = (intptr_t)req.reqnum;
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dirs[*watch] = n_full_path;
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return ERR_OK;
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}
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LibError dir_cancel_watch(const intptr_t watch)
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{
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if(initialized == -1)
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return ERR_FAIL; // NOWARN
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if(!initialized)
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WARN_RETURN(ERR_LOGIC);
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FAMRequest req;
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req.reqnum = (int)watch;
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RETURN_ERR(FAMCancelMonitor(&fc, &req));
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return ERR_OK;
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}
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int dir_get_changed_file(char* fn)
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{
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if(initialized == -1)
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return ERR_FAIL; // NOWARN
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if(!initialized)
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WARN_RETURN(ERR_LOGIC);
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FAMEvent e;
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while(FAMPending(&fc) > 0)
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{
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if(FAMNextEvent(&fc, &e) >= 0)
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{
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if (e.code == FAMChanged || e.code == FAMCreated || e.code == FAMDeleted)
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{
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char n_path[PATH_MAX];
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const char* dir = dirs[e.fr.reqnum].c_str();
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snprintf(n_path, PATH_MAX, "%s%c%s", dir, DIR_SEP, e.filename);
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RETURN_ERR(file_make_portable_path(n_path, fn));
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return ERR_OK;
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}
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}
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}
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// just nothing new; try again later
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return ERR_AGAIN; // NOWARN
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}
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