--- libaitio/src/exec.c	2013/12/05 12:43:04	1.1
+++ libaitio/src/exec.c	2013/12/15 22:57:20	1.2
@@ -0,0 +1,551 @@
+#include "global.h"
+
+
+/*
+ * io_progInit() - Init program pool
+ *
+ * @progName = program name for execution
+ * @initNum = initial started programs
+ * @maxNum = maximum started programs
+ * return: NULL error or !=NULL allocated pool (must destroied with io_progDestroy())
+ */
+prog_t *
+io_progInit(const char *progName, u_int initNum, u_int maxNum)
+{
+	prog_t *prg = NULL;
+
+	if (initNum > maxNum)
+		return NULL;
+
+	prg = e_malloc(sizeof(prog_t));
+	if (!prg) {
+		io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
+		return NULL;
+	} else
+		memset(prg, 0, sizeof(prog_t));
+
+	prg->prog_inin = initNum;
+	prg->prog_maxn = maxNum;
+	strlcpy(prg->prog_name, progName, sizeof prg->prog_name);
+
+	prg->prog_used = e_malloc(E_ALIGN(prg->prog_maxn, sizeof *prg->prog_used) / 
+			sizeof *prg->prog_used);
+	if (!prg->prog_used) {
+		io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
+		e_free(prg);
+		return NULL;
+	}
+
+	prg->prog_fds = array_Init(prg->prog_maxn);
+	if (!prg->prog_fds) {
+		io_SetErr(elwix_GetErrno(), "%s", elwix_GetError());
+		e_free(prg->prog_used);
+		e_free(prg);
+		return NULL;
+	}
+
+	pthread_mutex_init(&prg->prog_mtx, NULL);
+	signal(SIGPIPE, SIG_IGN);
+
+	if (io_progOpen(prg, prg->prog_inin) < 0) {
+		io_progDestroy(&prg);
+		prg = NULL;
+	}
+	return prg;
+}
+
+/*
+ * io_progDestroy() - Destroy entire program pool
+ *
+ * @pprg = program pool
+ * return: none
+ */
+void
+io_progDestroy(prog_t ** __restrict pprg)
+{
+	if (!pprg || !*pprg)
+		return;
+
+	io_progClose(*pprg, 0);
+
+	e_free((*pprg)->prog_used);
+	array_Destroy(&(*pprg)->prog_fds);
+	pthread_mutex_destroy(&(*pprg)->prog_mtx);
+	signal(SIGPIPE, SIG_DFL);
+
+	e_free(*pprg);
+	*pprg = NULL;
+}
+
+/*
+ * io_progClose() - Close all programs in pool
+ *
+ * @prg = program pool
+ * @closeNum = close program(s) (0 all)
+ * return: 0 error, >0 closed programs
+ */
+int
+io_progClose(prog_t * __restrict prg, u_int closeNum)
+{
+	register int i;
+	int ret = 0;
+	struct tagPIOPID *p;
+
+	if (!prg)
+		return 0;
+	if (closeNum > prg->prog_maxn) {
+		io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
+		return 0;
+	}
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	for (i = array_Size(prg->prog_fds) - 1; 
+			(closeNum ? ret < closeNum : 42) && i > -1; i--)
+		if (array_Get(prg->prog_fds, i) && 
+#ifdef POPEN_STREAM
+				(p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
+#else
+				(p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
+#endif
+			kill(p->pid, SIGTERM);
+			usleep(1000);
+			if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
+				kill(p->pid, SIGKILL);
+#ifdef POPEN_STREAM
+			e_pclose(array(prg->prog_fds, i, FILE*));
+#else
+			e_pclose((int) array(prg->prog_fds, i, intptr_t));
+#endif
+			array_Del(prg->prog_fds, i, 0);
+			clrbit(prg->prog_used, i);
+			prg->prog_cnum--;
+			ret++;
+		}
+	pthread_mutex_unlock(&prg->prog_mtx);
+
+	return ret;
+}
+
+/*
+ * io_progCloseAt() - Close program at pool of certain position
+ *
+ * @prg = program pool
+ * @idx = index at pool
+ * return: 0 error or !=0 closed program
+ */
+int
+io_progCloseAt(prog_t * __restrict prg, u_int idx)
+{
+	int ret = 0;
+	struct tagPIOPID *p;
+
+	if (!prg)
+		return 0;
+	if (idx > prg->prog_maxn) {
+		io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
+		return 0;
+	}
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	if (array_Get(prg->prog_fds, idx) && 
+#ifdef POPEN_STREAM
+			(p = pio_pgetpid(array(prg->prog_fds, idx, FILE*)))) {
+#else
+			(p = pio_pgetpid((int) array(prg->prog_fds, idx, intptr_t)))) {
+#endif
+		kill(p->pid, SIGTERM);
+		usleep(1000);
+		if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
+			kill(p->pid, SIGKILL);
+#ifdef POPEN_STREAM
+		e_pclose(array(prg->prog_fds, idx, FILE*));
+#else
+		e_pclose((int) array(prg->prog_fds, idx, intptr_t));
+#endif
+		array_Del(prg->prog_fds, idx, 0);
+		clrbit(prg->prog_used, idx);
+		prg->prog_cnum--;
+		ret++;
+	}
+	pthread_mutex_unlock(&prg->prog_mtx);
+
+	return ret;
+}
+
+/*
+ * io_progCloseOf() - Close program at pool with certain handle
+ *
+ * @prg = program pool
+ * @h = handle of program
+ * return: 0 error, >0 closed programs
+ */
+int
+#ifdef POPEN_STREAM
+io_progCloseOf(prog_t * __restrict prg, FILE *h)
+#else
+io_progCloseOf(prog_t * __restrict prg, int h)
+#endif
+{
+	register int i;
+	int ret = 0;
+	struct tagPIOPID *p;
+#ifdef POPEN_STREAM
+	FILE *f;
+#else
+	int f;
+#endif
+
+	if (!prg)
+		return 0;
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	for (i = 0; i < array_Size(prg->prog_fds); i++)
+		if (array_Get(prg->prog_fds, i)) {
+#ifdef POPEN_STREAM
+			f = array(prg->prog_fds, i, FILE*);
+			if (f == h && (p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
+#else
+			f = (int) array(prg->prog_fds, i, intptr_t);
+			if (f == h && (p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
+#endif
+				kill(p->pid, SIGTERM);
+				usleep(1000);
+				if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
+					kill(p->pid, SIGKILL);
+#ifdef POPEN_STREAM
+				e_pclose(array(prg->prog_fds, i, FILE*));
+#else
+				e_pclose((int) array(prg->prog_fds, i, intptr_t));
+#endif
+				array_Del(prg->prog_fds, i, 0);
+				clrbit(prg->prog_used, i);
+				prg->prog_cnum--;
+				ret++;
+				break;
+			}
+		}
+	pthread_mutex_unlock(&prg->prog_mtx);
+
+	return ret;
+}
+
+/*
+ * io_progOpen2() - Start program from pool on first unused slot
+ *
+ * @prg = program pool
+ * return: -1 error, >-1 reside at slot
+ */
+int
+io_progOpen2(prog_t * __restrict prg)
+{
+#ifdef POPEN_STREAM
+	FILE *f = NULL;
+#else
+	int f = -1;
+#endif
+	int stat, ret = -1;
+	register int i;
+	pid_t pid;
+
+	if (!prg)
+		return -1;
+	if (prg->prog_cnum + 1 > prg->prog_maxn) {
+		io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
+		return -1;
+	}
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	for (i = 0; i < array_Size(prg->prog_fds); i++)
+		if (!array_Get(prg->prog_fds, i)) {
+			f = e_popen(prg->prog_name, "r+", &pid);
+#ifdef POPEN_STREAM
+			if (!f) {
+#else
+			if (f == -1) {
+#endif
+				LOGERR;
+				break;
+			} else if (waitpid(pid, &stat, WNOHANG)) {
+				io_SetErr(ECHILD, "Program with pid=%d exit with status %d", 
+						pid, WIFEXITED(stat) ? WEXITSTATUS(stat) : -1);
+				e_pclose(f);
+				break;
+			} else
+				array_Set(prg->prog_fds, i, f);
+			clrbit(prg->prog_used, i);
+			prg->prog_cnum++;
+			ret = i;
+			break;
+		}
+	pthread_mutex_unlock(&prg->prog_mtx);
+
+	return ret;
+}
+
+/*
+ * io_progOpen() - Execute number of program(s)
+ *
+ * @prg = program pool
+ * @execNum = execute program(s) (0 max)
+ * return: -1 error, >0 executed programs
+ */
+int
+io_progOpen(prog_t * __restrict prg, u_int execNum)
+{
+#ifdef POPEN_STREAM
+	FILE *f;
+#else
+	int f;
+#endif
+	int stat, ret = 0;
+	register int i;
+	pid_t pid;
+
+	if (!prg)
+		return -1;
+	if (prg->prog_cnum + execNum > prg->prog_maxn) {
+		io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
+		return -1;
+	}
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	for (i = 0; (execNum ? ret < execNum : 42) && i < array_Size(prg->prog_fds); i++)
+		if (!array_Get(prg->prog_fds, i)) {
+			f = e_popen(prg->prog_name, "r+", &pid);
+#ifdef POPEN_STREAM
+			if (!f) {
+#else
+			if (f == -1) {
+#endif
+				LOGERR;
+				ret = -1;
+				break;
+			} else if (waitpid(pid, &stat, WNOHANG)) {
+				io_SetErr(ECHILD, "Program with pid=%d exit with status %d", 
+						pid, WIFEXITED(stat) ? WEXITSTATUS(stat) : -1);
+				e_pclose(f);
+				ret = -1;
+				break;
+			} else
+				array_Set(prg->prog_fds, i, f);
+			clrbit(prg->prog_used, i);
+			prg->prog_cnum++;
+			ret++;
+		}
+	pthread_mutex_unlock(&prg->prog_mtx);
+
+	return ret;
+}
+
+/*
+ * io_progGrow() - Execute to number of programs in pool
+ *
+ * @prg = program pool
+ * @toNum = execute to number of programs (0 max)
+ * return: 0 error or nothing to do, 
+ * 	>0 executed programs and abs(<0) executed programs with logged error
+ */
+int
+io_progGrow(prog_t * __restrict prg, u_int toNum)
+{
+	if (!prg)
+		return 0;
+	if (toNum > prg->prog_maxn) {
+		io_SetErr(EINVAL, "Requested number for program execution is over pool's limit");
+		return 0;
+	}
+	if (!toNum)
+		toNum = prg->prog_maxn;
+	if (toNum < prg->prog_inin)
+		toNum = prg->prog_inin;
+
+	if ((int) (toNum - prg->prog_cnum) < 1)
+		return 0;
+
+	return io_progOpen(prg, toNum - prg->prog_cnum);
+}
+
+/*
+ * io_progVacuum() - Vacuum pool to running number of programs
+ *
+ * @prg = program pool
+ * @toNum = vacuum to number of programs (0 to init number)
+ * return: 0 error or >0 closed programs
+ */
+int
+io_progVacuum(prog_t * __restrict prg, u_int toNum)
+{
+	register int i;
+	int ret = 0;
+	struct tagPIOPID *p;
+
+	if (!prg)
+		return 0;
+	if (toNum > prg->prog_maxn) {
+		io_SetErr(EINVAL, "Requested number for close program is over pool's limit");
+		return 0;
+	}
+	if (!toNum)
+		toNum = prg->prog_inin;
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	for (i = array_Size(prg->prog_fds) - 1; prg->prog_cnum > toNum && i > -1; i--)
+		if (array_Get(prg->prog_fds, i) && isclr(prg->prog_used, i) && 
+#ifdef POPEN_STREAM
+				(p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
+			kill(p->pid, SIGTERM);
+			usleep(1000);
+			if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
+				kill(p->pid, SIGKILL);
+			e_pclose(array(prg->prog_fds, i, FILE*));
+#else
+				(p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
+			kill(p->pid, SIGTERM);
+			usleep(1000);
+			if (waitpid(p->pid, &p->stat, WNOHANG) > 0)
+				kill(p->pid, SIGKILL);
+			e_pclose((int) array(prg->prog_fds, i, intptr_t));
+#endif
+			array_Del(prg->prog_fds, i, 0);
+			prg->prog_cnum--;
+			ret++;
+		}
+	pthread_mutex_unlock(&prg->prog_mtx);
+
+	return ret;
+}
+
+/*
+ * io_progCheck() - Check exit status of program pool
+ *
+ * @prg = program pool
+ * @re = resurrect program to init number
+ * return: -1 error or >-1 exited programs
+ */
+int
+io_progCheck(prog_t * __restrict prg, int re)
+{
+	int ret = 0;
+	struct tagPIOPID *p;
+	register int i;
+
+	if (!prg)
+		return -1;
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	for (i = 0; i < array_Size(prg->prog_fds); i++)
+		if (array_Get(prg->prog_fds, i) && 
+#ifdef POPEN_STREAM
+				(p = pio_pgetpid(array(prg->prog_fds, i, FILE*)))) {
+#else
+				(p = pio_pgetpid((int) array(prg->prog_fds, i, intptr_t)))) {
+#endif
+			if (waitpid(p->pid, &p->stat, WNOHANG)) {
+				clrbit(prg->prog_used, i);
+#ifdef POPEN_STREAM
+				e_pclose(array(prg->prog_fds, i, FILE*));
+#else
+				e_pclose((int) array(prg->prog_fds, i, intptr_t));
+#endif
+				array_Del(prg->prog_fds, i, 0);
+				prg->prog_cnum--;
+				ret++;
+			}
+		}
+	pthread_mutex_unlock(&prg->prog_mtx);
+
+	/* resurrect to init number */
+	if (re && ((int) (prg->prog_inin - prg->prog_cnum) > 0))
+		io_progOpen(prg, prg->prog_inin - prg->prog_cnum);
+
+	return ret;
+}
+
+/*
+ * io_progAttach() - Attach to open program
+ *
+ * @prg = program pool
+ * @newOne = Execute new one program after attach
+ * return: NULL error or !=NULL attached program handle
+ */
+#ifdef POPEN_STREAM
+FILE *
+#else
+int
+#endif
+io_progAttach(prog_t * __restrict prg, int newOne)
+{
+#ifdef POPEN_STREAM
+	FILE *f = NULL;
+#else
+	int f = -1;
+#endif
+	register int i;
+
+	if (!prg)
+#ifdef POPEN_STREAM
+		return NULL;
+#else
+		return -1;
+#endif
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	for (i = 0; i < array_Size(prg->prog_fds); i++)
+		if (array_Get(prg->prog_fds, i) && isclr(prg->prog_used, i)) {
+			setbit(prg->prog_used, i);
+#ifdef POPEN_STREAM
+			f = array(prg->prog_fds, i, FILE*);
+#else
+			f = array(prg->prog_fds, i, intptr_t);
+#endif
+			break;
+		}
+	pthread_mutex_unlock(&prg->prog_mtx);
+
+	/* execute new one program */
+	if (newOne) {
+		if (f)
+			io_progOpen(prg, 1);
+		else if ((i = io_progOpen2(prg)) > -1)
+			/* not found free program */
+#ifdef POPEN_STREAM
+			f = array(prg->prog_fds, i, FILE*);
+#else
+			f = array(prg->prog_fds, i, intptr_t);
+#endif
+	}
+
+	return f;
+}
+
+/*
+ * io_progDetach() - Detch from open program
+ *
+ * @prg= program pool
+ * @pfd = attached program handle
+ * return: none
+ */
+void
+#ifdef POPEN_STREAM
+io_progDetach(prog_t * __restrict prg, FILE *pfd)
+#else
+io_progDetach(prog_t * __restrict prg, int pfd)
+#endif
+{
+	register int i;
+
+	if (!prg || !pfd)
+		return;
+
+	pthread_mutex_lock(&prg->prog_mtx);
+	for (i = 0; i < array_Size(prg->prog_fds); i++)
+#ifdef POPEN_STREAM
+		if (array(prg->prog_fds, i, FILE*) == pfd) {
+#else
+		if (array(prg->prog_fds, i, intptr_t) == pfd) {
+#endif
+			clrbit(prg->prog_used, i);
+			break;
+		}
+	pthread_mutex_unlock(&prg->prog_mtx);
+}